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HomeMy WebLinkAboutCT 00-02; CALAVERA HILLS Y; HYDROLOGY STUDY; 2002-10-18HUNSAKER ^ASSOCIATES SAN DIEGO, INC. PLANNING ENCINEERING SURVEYING IRVINE RIVERSIDE SAN DIEGO HYDROLOGY STUDY for CALAVERA HILLS VILLAGE "Y" City of Carlsbad, California Prepared for: McMillin Companies 2727 Hoover Avenue National City, CA 91950 W.O. 1941-41 October 18, 2002 DAVE HAMMAR LEX WILLIMAN ALISA VIALPANDO DANA SEGUIN Hunsaker & Associates San Diego, Inc. Raymond L. Martin, R.C.E. Project Manager 10179 Huennekens St. San Diego, CA 92121 (858) SS8.4S00 PH (858) 338-1414 FX www.HunsakerSD.com lnfoeHunsakerSD.com I li:ytpaiiUMIUl\rt].ioe IMMI mva IlkM AM Calavera Hills Village "T" Hydrology Stuciy TABLE OF CONTENTS Executive Summary Introduction Existing Condition Proposed Project Results References SECTION Methodology & Model Development Rational Method Hydrologic Analysis II Rational Method Hydrologic Output AES Onsite Hydrologic Results - 100-Year Design Storni Ili Hydraulic Analysis IV Curb inlet Design Developed Condition Hydrology Map (pocket) JCaam li:1rqiaiUU»4mi\a03Jiic WJI>.1M1.41 7/2»D2U1PM Calavera Hills Village "V Hydrology Study Introduction EXECUTIVE SUMMARY The purpose ofthis report is to develop a storni drain system that will convey 10O-year flows per the County of San Diego Drainage Design Manual. This drainage report covers drainage improvements for Calavera Hills Village "Y" and will address the following: • Developed Condition 100-Year Peak Discharge (site mnoff) • Hydraulic Analysis • Curb Inlet Design (3^ r CALAVDUj PROJECT SITE VICINITY MAP HOT JO SCALE JC:q h:Vq>onfM94I\41Va03.doc vn iiut-it in/iimitimAU Calavera Hills Village "Y" Hydrology Study Existing Condition The Calavera Hills Village "Y" property is located within the City of Carlsbad west of the proposed extension of College Boulevard and north of the proposed Calavera Hills Village "X". Proposed Proiect Development of the site will include the construction of multi-family units as well as commercial pads. No offsite drainage will be conveyed through the site. Runoff from the majority ofthe Village T" site will drain via a proposed stomn drain system to the southwest corner of the site. The mnoff will then empty into a proposed 18" stomi drain system that will convey mnoff through Calavera Hilis village "X". A small portion of the Village "Y" site (northeast portion) will drain to a proposed 18-Inch RCP in College Boulevard. Results The peak flow conveyed to Calavera Hills Village "X" is 19.88 cfs. The 100-year mnoff added to the College Boulevard storm drain system is 2.81 cfs. A tailwater elevation of 299.60 ft. (per Dwg. 390-9) was used at Node 52 (see enclosed map). This analysis uses hydrologic and hydraulic criteria as set forth by the City of Carisbad. Peak flowrates were based on a 100-year rainfall event. A mnoff coefficient of 0.70, which corresponds to multi-unit housing and Soil Group D, was used for all multi-family areas, while a mnoff coefficient of 0.85 was assumed for proposed commercial areas. References Drainage Design and Procedure Manual. County of San Diego. April 1993. Improvement Plans for College Boulevard and Cannon Road. Dwg. 390-9. Master Drainage and Stonv Water Quality Management Plan for the City of Carisbad, California. City of Carisbad Engineering Department March 1994. JC:s( b:VqMrtl\1941\4I\a03.doc Calavera Hills Village "Y" Hydrology Study METHODOLOGY & MODEL DEVELOPMENT Rational Method Hvdrologic Analysis Computer Software Package - AES-99 Design Stomri - 100-year retum inten/als Land Use - Multi-family units and commercial area onsite Soil Type - Hydrologic soil group D was assumed for all areas. Group D soils have very slow infiltration rates when thoroughly wetted. Consisting chiefly of ciay soils with a high swelling potential, soils with a high permanent water table, soils with clay pan or clay layer at or near the surface, and shallow soils over neariy impervious materials. Group D soils have a very slow rate of water transmission. Runoff Coefficient - In accordance with the City of Carisbad standards, single-family residential areas were designated a mnoff coefficient of 0.55, multi-family areas were designated a coefficient of 0.70, and natural areas were designated a mnoff coefficient of 0.45. When a watershed encompasses commercial area, a mnoff coefficient of 0.85 was selected. Rainfall Intensity - Initial time of concentration values were detennined using the County of San Diego's overiand flow nomograph for urban areas. Downstream Tc values are detemiined by adding the initial sub-basin time of concentration and the downstream routing time. Per City of Carisbad standards, intensity values were detennined from the County of San Diego's Intensity-Duration equation. Method of Analysis - The Rational Method is the most widely used hydrologic model for estimating peak mnoff rates. Applied to small uriDan and seml-urii)an areas with drainage areas less than 0.5 square miles, the Rational Method relates stomri rainfall Intensity, a mnoff coefficient, and drainage area to peak mnoff rate. This relationship is expressed by the equation: Q = CIA, where: Q = The peak mnoff rate in cubic feet per second at the point of analysis. C = A mnoff coefficient representing the area - averaged ratio of mnoff to rainfall intensity. I = The time-averaged rainfall intensity in inches per hour corresponding to the time of concentration. A = The drainage basin area In acres. To perform a node-link study, the total watershed area is divided into subareas which discharge at designated nodes. ICamm h.'1npaUU94IV«lWSJloc vj>.i»ii-«i immiiint Calavera Hills Village Hydrology Study The procedure for the subarea summation model is as follows: (1) Subdivide the watershed into an initial subarea (generally 1 lot) and subsequent subareas, which are generally less than 10 acres in size. Assign upstream and downstream node numbers to each subarea. (2) Estimate an initial Tc by using the appropriate nomograph or overiand flow velocity estimation. (3) Using the initial Tc, detennine the corresponding values of I. Then Q = C I A. (4) Using Q, estimate the travel time between this node and the next by Manning's equation as applied to the particular channel or conduit linking the two nodes. Then, repeat the calculation for Q based on the revised intensity (which is a function ofthe revised time of concentration) The nodes are joined together by links, which may be street gutter flows, drainage swales, drainage ditches, pipe flow, or various channel flows. The AES-99 computer subarea menu Is as follows: SUBAREA HYDROLOGIC PROCESS 1. Confluence analysis at node. 2. Initial subarea analysis (Including time of concentration calculation). 3. Pipe flow travel time (computer estimated). 4. Pipe flow travel time (user specified). 5. Trapezoidal channel travel time. 6. Street flow analysis through subarea. 7. User - specified information at node. 8. Addition of subarea mnoff to main line. 9. V-gutter flow through area. 10. Copy main stream data to memory bank 11. Confluence main stream data with a memory bank 12. Clear a memory bank At the confluence point of two or more basins, the following procedure Is used to combine peak flow rates to account for differences in the basin's times of concentration. This adjustment is based on the assumption that each basin's hydrographs are triangular in shape. (1) . If the collection streams have the same times of concentration, then the Q values are directly summed, Qp = Qa + Qb; Tp = Ta = Tb (2) . If the collection streams have different times of concentration, the smaller ofthe tributary Q values may be adjusted as follows: JCama h:VB|ntiM941\4I\i03jiloc WJLIMMI 7/2M2 2:21PM Calavera Hills Village "Y" Hydrology Study (1). The most frequent case is where the collection stream with the longer time of concentration has the larger Q. The smaller Q value Is adjusted by the ratio of rainfall intensities. Qp = Qa + Qb (la/lb); Tp = Ta (ii). In some cases, the collection stream with the shorter time of concentration has the larger Q. Then the smaller Q is adjusted by a ratio of the T values. Qp = Qb+Qa (Tbn-a):Tp = Tb jCau k.'in|ionMMIV<l\il»jliic WJl. IMMI 7/2SII|I22:2irM Calavera Hills Village 'Y" Hydrology Study RATIONAL METHOD HYDROLOGIC OUTPUT AES Onsite Hydrologic Results 100-Year Design Storm kVqnUUMMIMnikc WJl. IMMI 7/2WB 2:21PM **************************************************************************** RATIONAL METHOD HYDROLOGY COMPUTER PR<3GRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982-99 Advanced Engineering Software (aes) Ver. l.SA Release Date: 01/01/99 License ID 1239 Analysis prepared by: Hunseiker & Associates San Diego, Inc. 10179 Huennekens Street San Diego, Califomia (619) 558-4500 Plcuming Engineering Surveying ************************** DESCRIPTION OF STUDY ************************** * CALAVERA HILLS VILLAGE "Y" * * 100-YEAR DEVELOPED CONDITION ANALYSIS * * WO: 1941-41, DAT: 236 * *****************************************************«*««««**««*«««««««««^ FILE NAME: H:\AES99\1941\41\DEV100A.DAT TIME/DATE OF STUDY: 10:20 10/18/2002 USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) « 100.00 6-HOUR DURATION PRECIPITATION (INCHES) » 2.800 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE -0.90 SAN DIEGO HYDROLOGY MANUAL "C"-VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED **********************************************************«*««««**««*«««««, FLOW PROCESS FROM NODE 120.00 TO NODE 2.00 IS CODE = 21 »>»RATIONAL METHOD INITIAL SUBAREA ANALYSIS«<« SOIL CLASSIFICaVTION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT » .7000 INITIAL SUBAREA FLOW-LENGTH = 220.00 UPSTREAM ELEVATION - 313.00 DOWNSTREAM ELEVATION = 309.00 ELEVATION DIFFERENCE = 4.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) » 8.750 100 YEAR RAINFALL INTENSITY (INCH/HOUR) » 5.142 SUBAREA RUNOFF (CFS) - 0.36 TOTAL AREA(ACRES) « 0.10 TOTAL RUNOFF(CFS) » 0.36 ******************************************************it***««*«««**««**«,t«««« FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 3 »»>COMPOTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) ««< ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 2.2 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 3.0 UPSTREAM NODE ELEVATION - 304.68 DOWNSTREAM NODE ELEVATION = 303.69 FLOWLENGTH(FEET) = 72.09 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES PIPEFLOW THRU SUBAREA(CFS) = 0.36 TRAVEL TIME(MIN.) » 0.40 TC(MIN.) = 9.15 *****»*****************1,***l,****l,»*i,***1,ttti,tt1,i,i,i,tti,i,tt,i,tti,t*1,t1,i,t1,t»**ti FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE » 10 »»>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 «<« **************»***«**«««,,«««**», FLOW PROCESS FROM NODE 100.00 TO NODE 3.00 IS CODE » 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW-LENGTH - 210.00 UPSTREAM ELEVATION » 313.00 DOWNSTREAM ELEVATION = 308.20 ELEVATION DIFFERENCE = 4.80 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) - 4.951 TIME OF CONCENTRATION ASSUMED AS 6-MINUTES 100 YEAR RAINFALL INTENSITY(INCH/HOUR) » 6.559 SUBAREA RUNOFF(CFS) » 3.29 TOTAL AREA(ACRES) = 0.59 TOTAL RUNOFF(CFS) - 3.29 **********************««««*,,»,«»*,(,*<,*», FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE » 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE«<« ••"»••••»"=»•»""»"==»»"=»"====»======»»»===»==»«===.«=.=»===«===.===.„.=„„ TOTAL NUMBER OF STREAMS > 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) - 6.00 RAINFALL INTENSITY(INCH/HR) » 6.56 TOTAL STREAM AREA(ACRES) =0.59 PEAK FLOW RATE(CFS) AT CONFLUENCE = 3.29 ************«****«*****«, FLOW PROCESS FROM NODE 121.00 TO NODE 3.00 IS CODE » 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH - 250.00 UPSTREAM ELEVATION - 313.00. DOWNSTREAM ELEVATION » 308.20 ELEVATION DIFFERENCE = 4.80 URBAN SUBAREA OVERLAND TIME OF FLOW (MINUTES) - 9.160 100 YEAR RAINFALL INTENSITY(INCH/HOUR) » 4.993 SUBAREA RUNOFF(CFS) » 0.45 TOTAL AREA (ACRES) = o:i3 TOTAL RUNOFF (CFS) = 0.45 FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE » 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< »»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< TOTAL NUMBER OF STREAMS « 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) - 9.16 RAINFALL INTENSITY(INCH/HR) = 4.99 TOTAL STREAM AREA(ACRES) = 0.13 PEAK FLOW RATE(CFS) AT CONFLUENCE = 0.45 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 3.29 6.00 6.559 0.59 2 0.45 9.16 4.993 0.13 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 3.64 6.00 6.559 2 2.96 9.16 4.993 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) - 3.64 Tc(MIN.) » 6.00 TOTAL AREA(ACRES) - 0.72 *********************«*«,«««,,, FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE » 11 »>»CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY«<« ••"""•"••" = "•"»»""»"•"=»" = = "»««=•»»=•» —»»« = — «=-»«»=o===i» = ==».«=..,„».,== ** MAIN STREAM CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 3.64 6.00 6.559 0.72 ** MEMORY BANK # 1 CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 0.36 9.15 4.996 0.10 ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 3.91 6.00 6.559 2 3.13 9.15 4.996 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) - 3.91 Tc(MIN.) = 6.00 TOTAL AREA(ACRES) » 0.82 ********»********-M****»»1,****-k-l,*1,1,»*****tt1,tt»ttt1,t1,1,tt1,t1,1,*ti,ti,i,i,t»i,i,t1,1,ti,t FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE » 12 »»>CLEAR MEMORY BANK # 1 <«« ***************«****•**»««»«***,,,«»», FLOW PROCESS FROM NODE 3.00 TO NODE 31.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)«<« ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 8.0 INCHES PIPEFLOW VELOCITY(FEET/SEC.) • 5.2 UPSTREAM NODE ELEVATION - 303.36 DOWNSTREAM NODE ELEVATION = 302.52 FLOWLENGTH(FEET) = 89.06 MANNING'S N » 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES « 1 PIPEFLOW THRU SUBAREA(CFS) = 3.91 TRAVEL TIME(MIN.) = 0.29 TC(MIN.) = 6.29 ***************««**«**,«««*««««*»««, FLOW PROCESS FROM NODE 31.00 TO NODE 31.00 IS CODE = 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< TOTAL NUMBER OF STREAMS « 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) » 6.29 RAINFALL INTENSITY(INCH/HR) - 6.36 TOTAL STREAM AREA(ACRES) = 0.82 PEAK FLOW RATE(CFS) AT CONFLUENCE » 3.91 »**************•****•*•*««»,,«««#««««, FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODfi > 21 >»»RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«<< SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH - 140.00 UPSTREAM ELEVATION » 310.10 DOWNSTREAM ELEVATION = 308.70 ELEVATION DIFFERENCE = 1.40 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) - 8.519 100 YEAR RAINFALL INTENSITY (INCH/HOUR) - 5.231 SUBAREA RUNOFF(CFS) « 0.77 TOTAL AREA(ACRES) = 0.21 TOTAL RUNOFF(CFS) = 0.77 ***************«*«««*»««««,«««#**, FLOW PROCESS FROM NODE 103.00 TO NODE 4.00 IS CODE = 6 >»»COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< UPSTREAM ELEVATION - 308.70 DOWNSTREAM ELEVATION « 307.60 STREET LENGTH(FEET) > 110.00 CURB HEIGHT(INCHES) - 6. STREET HALFWIDTH(FEET) » 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK =10.50 INTERIOR STREET CROSSFALL(DECIMAL) » 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) » 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF - 1 ••TRAVELTIME COMPUTED USING MEAN PLOW(CFS) » 1.40 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) = 0.28 HALFSTREET FLOODWIDTH(FEET) » 7.73 AVERAGE FLOW VELOCITY(FEET/SEC.) » 1.96 PRODUCT OF DEPTH&VELOCITY » 0.55 STREETFLOW TRAVELTIME(MIN) = 0.94 TC(MIN) = 9.45 100 YEAR RAINFALL INTENSITY(INCH/HOUR) - 4.891 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 SUBAREA AREA (ACRES) = 0.37 SUBAREA RUNOFF (CFS) » 1.27 SUMMED AREA(ACRES) - 0.58 TOTAL RUNOFF(CFS) - 2.04 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) - 0.31 HALFSTREET FLOODWIDTH(FEET) = 9.05 FLOW VELOCITY(FEET/SEC.) = 2.17 DEPTH'VELOCITY = 0.67 ****«***************«*«***«««*•,»««»«, FLOW PROCESS FROM NODE 4.00 TO NODE 31.00 IS CODE » 3 »>>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« >>>>>USING COMPOTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<« ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 4.6 INCHES PIPEFLOW VELOCITY(FEET/SEC.) » 5.7 UPSTREAM NODE ELEVATION = 303.13 DOWNSTREAM NODE ELEVATION = 302.52 FLOWLENGTH(FEET) - 30.50 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) » 18.00 NUMBER OF PIPES PIPEFLOW THRU SUBAREA(CFS) - 2.04 TRAVEL TIME(MIN.) » 0.09 TC(MIN.) » 9.54 ***********«****«*****•*********«*******««««#»*,,,»«***, FLOW PROCESS FROM NODE 31.00 TO NODE 31.00 IS CODE - 1 >»»DES IGNATE INDEPENDENT STREAM FOR CONFLUENCE««< »»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES«<« TOTAL NUMBER OF STREAMS • 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OP CONCENTRATION(MIN.) - 9.54 RAINFALL INTENSITY(INCH/HR) = 4.86 TOTAL STREAM AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.04 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CPS) (MIN.) (INCH/HOUR) (ACRE) 1 3.91 6.29 6.365 0.82 2 2.04 9.54 4.862 0.58 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK PLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 5.46 6.29 6.365 2 5.02 9.54 4.862 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 5.46 Tc(MIN.) = 6.29 TOTAL AREA(ACRES) « 1.40 *******************************************«*«««**, FLOW PROCESS FROM NODE 31.00 TO NODE 32.00 IS CODE » 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<«< ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OP FLOW IN 18.0 INCH PIPE IS 8.9 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 6.3 UPSTREAM NODE ELEVATION = 302.19 DOWNSTREAM NODE ELEVATION » 300.24 FLOWLENGTH (FEET) = 154.51 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES - 1 PIPEFLOW THRU SUBAREA(CFS) » 5.4S TRAVEL TIME(MIN.) m 0.41 TC(MIN.) = 6.70 **************************«*•****««««*«««•*«, FLOW PROCESS FROM NODE 32.00 TO NODE 32.00 IS CODE » 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< 3B3BBBBBBBB3SSS3BBBSBBBBBB«BSESBS33BS3SBSSSBaSSBB83SSBBBBBSBS3BSSSBBBSSB3B3Ba TOTAL NUMBER OF STREAMS - 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) - 6.70 RAINFALL INTENSITY(INCH/HR) = 6.11 TOTAL STREAM AREA(ACRES) = 1.40 PEAK FLOW RATE(CFS) AT CONFLUENCE - 5.46 ********************«**«*********«««*«««****«*««««****«***»*jn,jmjm^j,j,,^jnm FLOW PROCESS FROM NODE 104.00 TO NODE 105.00 IS CODE = 21 »>»RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« „a» = ai = a = »»== = = = »==««» = = = = »=»»===»»" = =="""= =="" = = = === = "== = = " = " = '°=°"'°"°°'™°'"°""~ SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA PLOW-LENGTH = 120.00 UPSTREAM ELEVATION - 309.70 DOWNSTREAM ELEVATION « 308.50 ELEVATION DIFFERENCE > 1.20 URBAN SUBAREA OVERLAND TIME OP FLOW(MINUTES) = 7.887 100 YEAR RAINFALL INTENSITY(INCH/HOUR) « 5.498 SUBAREA RUNOFF(CFS) » 0.65 TOTAL AREA (ACRES) - 0.17 TOTAL RUNOFF (CFS) - 0.65 **************************************************************************** FLOW PROCESS FROM NODE 105.00 TO NODE 5.00 IS CODE » 6 »»>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< j...a=a=i»»a=ai» = .a=ia«.i«»a=«a—«««=««»"»»-««»»"«»»«=»»««=»»="»»"«»"""«««"»""" UPSTREAM ELEVATION « 308.50 DOWNSTREAM ELEVATION = 306.90 STREET LENGTH(FEET) - 160.00 CURB HEIGHT(INCHES) - 6. STREET HALFWIDTH(PEET) - 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.50 INTERIOR STREET CROSSFALL(DECIMAL) =0.020 OUTSIDE STREET CROSSFALL(DECIMAL) » 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF » 1 **TRAVELTIME COMPUTED USING MEAN FLOW(CFS) » 1.77 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) = 0.29 HALFSTREET FLOODWIDTH(FEET) = 8.39 AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.15 PRODUCT OF DEPTH&VELOCITY = 0.63 STREETFLOW TRAVELTIME(MIN) = 1.24 TC(MIN) = 9.13 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 5.004 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 SUBAREA AREA(ACRES) = 0.64 SUBAREA RUNOFF(CFS) = 2.24 SUMMED AREA(ACRES) - 0.81 TOTAL RUNOFF(CFS) - 2.90 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) =0.33 HALFSTREET FLOODWIDTH(FEET) = 10.36 FLOW VELOCITY(FEET/SEC.) - 2.43 DEPTH*VELOCITY » 0.81 **************************************************************************** FLOW PROCESS FROM NODE 5.00 TO NODE 32.00 IS CODE - 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU StJBAREA<«« »5.»USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)««< =»===»»»»==—«»==-==-»===-»======»==•»»=="==»»============"====="-"=="•"•"==•• ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 5.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 6.3 UPSTREAM NODE ELEVATION » 301.02 DOWNSTREAM NODE ELEVATION = 300.27 FLOWLENGTH(FEET) = 37.47 MANNING'S N » 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA{CFS) = 2.90 TRAVEL TIME(MIN.) = 0.10 TC(MIN.) = 9.23 **************************************************************************** FLOW PROCESS FROM NODE 32.00 TO NODE 32.00 IS CODE = 1 >»»DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<«<< TOTAL NUMBER OF STREAMS = 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OP CONCENTRATION(MIN.) = 9.23 RAINFALL INTENSITY(INCH/HR) = 4.97 TOTAL STREAM AREA(ACRES) = 0.81 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.90 **************************************************************************** FLOW PROCESS FROM NODE 106.00 TO NODE 107.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<«< • BBS3BS«BaiSSaiBBBSBBBai8BSSSSBB333aBBBSaBBBBB3BBBBB3BBBBB33BBBBSBSBBBBS3BBBBBS SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT » .7000 INITIAL SUBAREA FLOW-LENGTH = 160.00 UPSTREAM ELEVATION - 309.20 DOWNSTREAM ELEVATION = 307.60 ELEVATION DIFFERENCE = 1.60 URBAN SUBAREA OVERLAND TIME OF PLOW(MINUTES) = 9.107 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 5.011 SUBAREA RUNOFF(CFS) » 0.56 TOTAL AREA(ACRES) - 0.16 TOTAL RUNOFF(CFS) » 0.56 **************************************************************************** PLOW PROCESS FROM NODE 107.00 TO NODE 6.00 IS CODE - 6 »>»COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< BBBBSBBBBSB3BBBBSBaeSBB9iSSSB3BSSSB3B3BS3SBBB3SBBBS3BBBBBSSBSBBSa:BBSBB3B3BB33B UPSTREAM ELEVATION = 307.60 DOWNSTREAM ELEVATION = 305.00 STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.50 INTERIOR STREET CROSSFALL(DECIMAL) = 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 **TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 1.56 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) - 0.29 HALFSTREET FLOODWIDTH(FEET) = 8.39 AVERAGE FLOW VELOCITY (FEET/SEC.) = 1.90 PRODUCT OF DEPTHtVELOCITY = 0.56 STREETFLOW TRAVELTIME(MIN) = 2.29 TC(MIN) = 11.39 100 YEAR RAINFALL INTENSITY (INCH/HOUR) = 4.337 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT - .7000 SUBAREA AREA(ACRES) - 0.65 SUBAREA RUNOFF(CFS) = 1.97 SUMMED AREA(ACRES) - 0.81 TOTAL RUNOFF(CFS) » 2.53 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = 0.33 HALFSTREET FLOODWIDTH(FEET) « 10.36 FLOW VELOCITY (FEET/SEC.) » 2.13 DEPTH*VELOCITY = 0.71 **************************************************************************** FLOW PROCESS FROM NODE 6.00 TO NODE 32.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) ««< ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 6.2 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 4.7 UPSTREAM NODE ELEVATION = 301.30 DOWNSTREAM NODE ELEVATION = 300.27 FLOWLENGTH(FEET) = 103.30 MANNING'S N » 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 2.53 TRAVEL TIME(MIN.) = 0.37 TC(MIN.) » 11.76 **************************************************************************** FLOW PROCESS FROM NODE 32.00 TO NODE 32.00 IS CODE « 1 »>»DESIGNATE INDEPENDENT STREAM POR CONFLUENCE««< »»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< TOTAL NUMBER OF STREAMS > 3 CONFLUENCE VALUES USED POR INDEPENDENT STREAM 3 ARE: TIME OF CONCENTRATION(MIN.) = 11.76 RAINFALL INTENSITY(INCH/HR) « 4.25 TOTAL STREAM AREA(ACRES) = 0.81 PEAK FLOW RATE(CPS) AT CONFLUENCE = 2.53 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 5.46 6.70 6.111 1.40 2 2.90 9.23 4.969 0.81 3 2.53 11.76 4.250 0.81 RAINFALL INTENSITY AND TIME OP CONCENTRATION RATIO CONFLUENCE FORMULA USED POR 3 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 9.58 6.70 6.111 2 9.51 9.23 4.969 3 8.81 11.76 4.250 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK PLOW RATE(CFS) » 9.58 Tc(MIN.) = 6.70 TOTAL AREA(ACRES) - 3.02 **************************************************************************** FLOW PROCESS FROM NODE 32.00 TO NODE 34.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »>»USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) ««< BBBBSBBBBBBsaBBBBBBaVBSaBBBBBBBBBBBBBBBBBBBBBSBBBBSBBBBBEBBBBBSBBBBBBBBBBBBB ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 8.1 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 12.4 UPSTREAM NODE ELEVATION - 299.94 DOWNSTREAM NODE ELEVATION = 289.40 FLOWLENGTH (FEET) = 199.58 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) > 18.00 NUMBER OF PIPES - 1 PIPEFLOW THRU SUBAREA(CFS) = 9.58 TRAVEL TIME(MIN.) = 0.27 TC(MIN.) = 6.96 **************************************************************************** PLOW PROCESS FROM NODE 34.00 TO NODE 34.00 IS CODE = 1 »>»DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<«« B = SBSS33BBSB3BBBBBBSBBBSSaB = a:SSB3BBSSS3S = BS3BBB3B3BBSBSS3333BSBSBSsaiBS3BBBBB TOTAL NUMBER OF STREAMS > 2 CONFLUENCE VALUES USED POR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 6.96 RAINFALL INTENSITY(INCH/HR) » 5.96 TOTAL STREAM AREA(ACRES) =3.02 PEAK FLOW RATE(CFS) AT CONFLUENCE = 9.58 **************************************************************************** FLOW PROCESS FROM NODE 108.00 TO NODE 109.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« SSBBBBSSBBBBBBBaiBBSBBSBaiSBSBBSBBBBBBBBSaSSSBBBBBBBSSSSStBBBBBBBBai SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH - 100.00 UPSTREAM ELEVATION » 307.50 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 1.50 URBAN SUBAREA OVERLAND TIME OP FLOW(MINUTES) > 6.290 100 YEAR RAINFALL INTENSITY(INCH/HOUR) • 6.362 SUBAREA RUNOFF(CFS) > 0.62 TOTAL AREA(ACRES) « 0.14 TOTAL RUNOFF(CFS) - 0.62 >*************************************************************************** FLOW PROCESS PROM NODE 109.00 TO NODE 7.00 IS CODE « 6 »»>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< •"'•'SBBBaaBBBBBaaaBBBBBBBaaaBBBBBBBBBaaaaaBaBBBBaaaaBBBBBBBKSaBBBBBBSaSBBB UPSTREAM ELEVATION » 306.00 DOWNSTREAM ELEVATION » 300.00 STREET LENGTH(FEET) - 240.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(PEET) - 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK - 10.50 INTERIOR STREET CROSSFALL(DECIMAL) > 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 **TRAVELTIME COMPUTED USING MEAN FLOW(CFS) « 2.22 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) = 0.28 HALFSTREET FLOODWIDTH(FEET) « 7.73 AVERAGE FLOW VELOCITY(FEET/SEC.) - 3.09 PRODUCT OF DEPTH&VELOCITY = 0.87 STREETFLOW TRAVELTIME(MIN) • 1.29 TC{MIN) = 7.58 100 YEAR RAINFALL INTENSITY(INCH/HOUR) » 5.640 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT » .7000 SUBAREA AREA(ACRES) = 0.80 SUBAREA RUNOFF(CFS) = 3.16 SUMMED AREA(ACRES) - 0.94 TOTAL RUNOFF(CFS) - 3.78 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) =0.32 HALPSTREET FLOODWIDTH(FEET) = 9.70 FLOW VELOCITY(FEET/SEC.) = 3.57 DEPTH*VELOCITY = 1.14 **************************************************************************** FLOW PROCESS FROM NODE 7.00 TO NODE 34.00 IS CODE » 3 »>»COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) ««< BBBBBBBBBBaBaasBBBsaaBaaasBBBBBaaBBaaaBSBaaBBaasaaaasaBBBBBBaaaBaaBsaaaaaaaa ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 5.7 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 7.9 UPSTREAM NODE ELEVATION » 292.75 DOWNSTREAM NODE ELEVATION = 289.40 FLOWLENGTH (FEET) = 109.28 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 3.78 TRAVEL TIME(MIN.) - 0.23 TC(MIN.) = 7.81 **************************************************************************** FLOW PROCESS FROM NODE 34.00 TO NODE 34.00 IS CODE = 1 >>>»DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< >»»AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< B3SS33B3SBBBSS33SB = SS33B33B3SB3BSSBS3SaaS3S = Bsa:BS3SB3BSSS = SB3SBSSSB = 33BSBBB3B TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OP CONCENTRATION(MIN.) « 7.81 RAINFALL INTENSITY(INCH/HR) = 5.53 TOTAL STREAM AREA (ACRES) = 0.94 PEAK PLOW RATE(CFS) AT CONFLUENCE = 3.78 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 9.58 6.96 5.958 3.02 2 3.78 7.81 5.532 0.94 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED POR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 13.09 6.96 5.958 2 12.68 7.81 5.532 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 13.09 To(MIN.) = 6.96 TOTAL AREA(ACRES) - 3.96 **************************************************************************** FLOW PROCESS FROM NODE 34.00 TO NODE 35.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<«« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)«:<«< BBBBBBBBBBSaBBBSBBBBBBBaaBBaBBBaaBBBBBBaaaaB3aaasa3BBSBBB3SaBB3BBSBBBBBB3Baa DEPTH OP FLOW IN 21.0 INCH PIPE IS 14.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 7.4 UPSTREAM NODE ELEVATION - 289.07 DOWNSTREAM NODE ELEVATION - 288.09 FLOWLENGTH(FEET) = 86.92 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 13.09 TRAVEL TIME(MIN.) = 0.20 TC(MIN.) = 7.16 **************************************************************************** FLOW PROCESS FROM NODE 35.00 TO NODE 35.00 IS CODE - 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< BBBBBBBBBBBBBBSSsasBBBBBBBa=BBSss3ais33BBBaB3BSBBB33BBaBaBBaaaaaaaaaaaaaaBaaa TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION (MIN.) » 7.16 RAINFALL INTENSITY(INCH/HR) » 5.85 TOTAL STREAM AREA (ACRES) = 3.96 PEAK PLOW RATE(CFS) AT CONFLUENCE - 13.09 **************************************************************************** FLOW PROCESS FROM NODE 110.00 TO NODE 111.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« 3E3333B3SSSBBBaSBBSaaa3S3SBaBSBBBBBBSB3BS3Sa3SBBBBBaaaaaSBBaBS3aSS3a3aBSsaaa SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH = 120.00 UPSTREAM ELEVATION = 297.00 DOWNSTREAM ELEVATION = 295.80 ELEVATION DIFFERENCE = 1.20 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 7.887 100 YEAR RAINFALL INTENSITY(INCH/HOUR) - 5.498 SUBAREA RUNOFF(CFS) = 0.65 TOTAL AREA (ACRES) = 0.17 TOTAL RUNOFF (CFS) = 0.65 *************************************************************************** FLOW PROCESS FROM NODE 111.00 TO NODE 8.00 IS CODE » 6 >»»COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA«<« = = = = = = * = = = = = = = = = = = = = = = SSSS = S = = 9«S«« = = = BBB = 3 = = = = = = = = = = = = = = = = = BSBSS = BaS = aSS = S = UPSTREAM ELEVATION = 295.80 DOWNSTREAM ELEVATION = 293.00 STREET LENGTH{FEET) = 280.00 CURB HEIGHT(INCMES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE PROM CROWN TO CROSSFALL GRADEBREAK = 10.50 INTERIOR STREET CROSSFALL(DECIMAL) ' 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 SPECIFIED NUMBER OP HALFSTREETS CARRYING RUNOFF = 1 **TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 1.91 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) » 0.31 HALFSTREET FLOODWIDTH(PEET) = 9.05 AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.04 PRODUCT OF DEPTH&VELOCITY = 0.63 STREETFLOW TRAVELTIME(MIN) = 2.28 TC(MIN) = 10.17 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 4.666 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT » .7000 SUBAREA AREA(ACRES) = 0.76 SUBAREA RUNOFF(CFS) = 2.48 SUMMED AREA(ACRES) = 0.93 TOTAL RUNOFF(CFS) = 3.14 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) » 0.35 HALFSTREET FLOODWIDTH(FEET) = 11.02 FLOW VELOCITY(FEET/SEC.) - 2.36 DEPTH*VELOCITY « 0.82 ***********************************************************************, FLOW PROCESS FROM NODE 8.00 TO NODE 35.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE PLOW) ««< ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 7.0 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 4.9 UPSTREAM NODE ELEVATION = 288.22 DOWNSTREAM NODE ELEVATION = 288.09 FLOWLENGTH(FEET) = 13.46 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES PIPEFLOW THRU SUBAREA(CFS) = 3.14 TRAVEL TIME(MIN.) » 0.05 TC(MIN.) = 10.22 **************************************************************************** FLOW PROCESS FROM NODE 35.00 TO NODE 35.00 IS CODE = 1 »>»DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< >»»AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< BBBaaaaBBasaBBBaBaBBBBaBBBBaBXBBBBBBBBBBBBaaaBBBSBSBaaaSSBaBBaaBaBSBBBBBBBSB TOTAL NUMBER OF STREAMS - 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 10.22 RAINFALL INTENSITY(INCH/HR) - 4.65 TOTAL STREAM AREA(ACRES) = 0.93 PEAK FLOW RATE(CPS) AT CONFLUENCE = 3.14 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 13.09 7.16 5.852 3.96 2 3.14 10.22 4.653 0.93 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) „ (MIN.) (INCH/HOUR) 1 15.59 7.16 5.852 2 13.55 10.22 4.653 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK PLOW RATE(CFS) - 15.59 Tc(MIN.) = 7.16 TOTAL AREA(ACRES) » 4.89 **************************************************************************** FLOW PROCESS FROM NODE 35.00 TO NODE 36.00 IS CODE • 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) «<« ==============BBBBBBB===aa=B=====B=====«B==BB======B======aBBB=B====BB====== DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 13.0 UPSTREAM NODE ELEVATION = 287.76 DOWNSTREAM NODE ELEVATION = 275.43 FLOWLENGTH(PEET) = 275.99 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) » 18.00 NUMBER OP PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 15.59 TRAVEL TIME(MIN.) = 0.35 TC(MIN.) = 7.51 **************************************************************************** FLOW PROCESS FROM NODE 36.00 TO NODE 37.00 IS CODE = 3 »>»COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW) ««< B======aB=========a===BB===a=aB============BBBB====a=BB==aBa=a=====a==BB==BB ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 9.4 INCHES PIPEFLOW VELOCITY(FEET/SEC.) B 16.7 UPSTREAM NODE ELEVATION - 275.10 DOWNSTREAM NODE ELEVATION = 267.50 FLOWLENGTH(FEET) B 89.28 MANNING'S N » 0.013 ESTIMATED PIPE DIAMETER(INCH) B 18.00 NUMBER OP PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 15.59 TRAVEL TIME(MIN.) B 0.09 TC(MIN.) = 7.60 **************************************************************************** FLOW PROCESS FROM NODE 37.00 TO NODE 37.00 IS CODE B 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<««< BBBa=S=BBBBBBBBBBaBBBBBBaSaSSS8=aS==a==aa======BB========a=B=S==BBB==B====== TOTAL NUMBER OF STREAMS = 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 7.60 RAINFALL INTENSITY(INCH/HR) = 5.63 TOTAL STREAM AREA(ACRES) = 4.89 PEAK FLOW RATE(CFS) AT CONFLUENCE = 15.59 **************************************************************************** FLOW PROCESS FROM NODE 112.00 TO NODE 113.00 IS CODE = 21 »>»RATIONAL METHOD INITIAL SUBAREA ANALYSIS«<« SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH = 140.00 UPSTREAM ELEVATION = 294.10 DOWNSTREAM ELEVATION = 292.70 ELEVATION DIFFERENCE = 1.40 URBAN SUBAREA OVERLAND TIME OF FLOW (MINUTES) = 8.519 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 5.231 SUBAREA RUNOFF(CFS) « 0.70 TOTAL AREA(ACRES) = 0.19 TOTAL RUNOFF(CFS) = 0.70 **************************************************************************** FLOW PROCESS FROM NODE 113.00 TO NODE 10.00 IS CODE = 6 »»>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< UPSTREAM ELEVATION » 292.70 DOWNSTREAM ELEVATION = 272.08 STREET LENGTH(FEET) = 310.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE PROM CROWN TO CROSSFALL GRADEBREAK = 10.50 INTERIOR STREET CROSSFALL(DECIMAL) = 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 **TRAVELTIME COMPUTED USING MEAN PLOW(CFS) = 1.59 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(PEET) - 0.23 HALPSTREET FLOODWIDTH(FEET) - 5.11 AVERAGE PLOW VELOCITY(FEET/SEC.) » 4.19 PRODUCT OF DEPTH&VELOCITY = 0.96 STREETFLOW TRAVELTIME(MIN) B 1.23 TC(MIN) = 9.75 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 4.795 SOIL CLASSIFICATION IS "D" MULTI-ONITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 1.78 SUMMED AREA(ACRES) = 0.72 TOTAL RUNOFF(CFS) = 2.47 END OP SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) =0.25 HALFSTREET FLOODWIDTH(PEET) = 6.42 FLOW VELOCITY(FEET/SEC.) = 4.66 DEPTH*VELOCITY = 1.19 **************************************************************************** FLOW PROCESS FROM NODE 10.00 TO NODE 37.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« >»»USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)«<« BBBBBBBBBaaaB333BBBBaBBaaa3aaBBS3BB3BB3B3SS33SBBaBBBSaa333BBBBBBBa3Baaaaa8aB ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 6.2 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 4.6 UPSTREAM NODE ELEVATION = 267.60 DOWNSTREAM NODE ELEVATION = 267.50 FLOWLENGTH (FEET) = 10.25 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES « 1 PIPEFLOW THRU SUBAREA(CFS) - 2.47 TRAVEL TIME(MIN.) = 0.04 TC(MIN.) = 9.79 **************************************************************************** FLOW PROCESS FROM NODE 37.00 TO NODE 37.00 IS CODE - 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< B3B3SBS333B33aSS33SBBBS3SBS333BBSaasaaBBaB3333BBBBaBaBBS3B3BBBaBBBBBBaBB3aS3 TOTAL NUMBER OF STREAMS = 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.79 RAINFALL INTENSITY(INCH/HR) = 4.78 TOTAL STREAM AREA(ACRES) = 0.72 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.47 lr*************************************************************************** FLOW PROCESS FROM NODE 114.00 TO NODE 115.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS«<« BB33B3BBBB3a3BBB3BS3BBSaBaBBBBBBBBB33B33BS333BBB3333B3aaa3BBaaa SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH = 140.00 UPSTREAM ELEVATION = 292.80 DOWNSTREAM ELEVATION = 291.40 ELEVATION DIFFERENCE = 1.40 URBAN SUBAREA OVERLAND TIME OF PLOW(MINUTES) = 8.519 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 5.231 SUBAREA RUNOFF(CFS) = 0.62 TOTAL AREA(ACRES) = 0.17 TOTAL RUNOFF(CFS) B 0.62 **************************************************************************** FLOW PROCESS FROM NODE 115.00 TO NODE 11.00 IS CODE - 6 »»>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA««< B3saaBBBBBBBBBBasBBBBBaasBaaB3BaaaB3saBaBaaaaBBBaB3BSBBaaaBaaaBaBBBsaaBBsaaa UPSTREAM ELEVATION = 291.40 DOWNSTREAM ELEVATION B 276.00 STREET LENGTH(FEET) B 300.00 CURB HEIGHT(INCHES) - 6. STREET HALFWIDTH(FEET) - 12.00 DISTANCE PROM CROWN TO CROSSFALL GRADEBREAK - 10.50 INTERIOR STREET CROSSFALL(DECIMAL) = 0.020 OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF » 1 **TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 1.59 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) » 0.23 HALPSTREET FLOODWIDTH(FEET) = 5.11 AVERAGE FLOW VELOCITY(FEET/SEC.) = 4.19 PRODUCT OF DEPTH&VELOCITY = 0.96 STREETFLOW TRAVELTIME(MIN) - 1.19 TC{MIN) = 9.71 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 4.807 SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 SUBAREA AREA(ACRES) > 0.58 SUBAREA RUNOFF(CFS) = 1.95 SUMMED AREA(ACRES) = 0.75 TOTAL RUNOFF(CFS) « 2.57 END OP SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) =0.27 HALFSTREET FLOODWIDTH(PEET) = 7.08 PLOW VELOCITY(FEET/SEC.) - 4.16 DEPTH*VELOCITY B 1.11 **************************************************************************** FLOW PROCESS FROM NODE 11.00 TO NODE 37.00 IS CODE - 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)««< B33aaBaBB33B3BBBBBBBBBBBBBSBE3=33SB33S3aBSB3BBBBBBBBBBBBBBBS3S333B3S3BBBa8aa ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 6.3 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 4.7 UPSTREAM NODE ELEVATION = 267.60 DOWNSTREAM NODE ELEVATION = 267.50 FLOWLENGTH(FEET) = 10.25 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 2.57 TRAVEL TIME(MIN.) = 0.04 TC(MIN.) = 9.75 **************************************************************************** PLOW PROCESS PROM NODE 37.00 TO NODE 37.00 IS CODE = 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE«<<< >»»AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< TOTAL NUMBER OF STREAMS CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 3 ARE: TIME OP CONCENTRATION(MIN.) = 9.75 RAINFALL INTENSITY(INCH/HR) = 4.80 TOTAL STREAM AREA(ACRES) = 0.75 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.57 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 15.59 7.60 5.631 4.89 2 2.47 9.79 4.783 0.72 3 2.57 9.75 4.796 0.75 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 3 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CPS) (MIN.) (INCH/HOUR) 1 19.88 7.60 5.631 2 18.32 9.75 4.796 3 18.28 9.79 4.783 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 19.88 Tc(MIN.) = 7.60 TOTAL AREA(ACRES) = 6.36 **************************************************************************** FLOW PROCESS FROM NODE 37.00 TO NODE 38.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<«« >»»USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)««< BBS3BBBBBBaBBBBBaaaSB3SSSS33SS3«a»BBaaBaBBa3BBBBaBBBBBBa3BBBSBBB3BaaaaaBSaaa ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 9.4 INCHES PIPEFLOW VELOCITY(FEET/SEC.) =21.3 UPSTREAM NODE ELEVATION = 267.15 DOWNSTREAM NODE ELEVATION = 259.00 FLOWLENGTH(PEET) = 59.60 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 19.88 TRAVEL TIME(MIN.) = 0.05 TC(MIN.) = 7.65 +- END LINE 1 ANALYSIS **************************************************************************** FLOW PROCESS FROM NODE 122.00 TO NODE 50.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< BBBBaBBBSBSBBBBBBBBBBBaBBBBBBBBBBSSaBBaBBBBBBBBaaBBBaaBBBBBBBBBSBBBaaaaaaaaa SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH = 170.00 UPSTREAM ELEVATION = 313.00 DOWNSTREAM ELEVATION = 310.10 ELEVATION DIFFERENCE = 2.90 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 7.857 100 YEAR RAINFALL INTENSITY(INOI/HOUR) = 5.512 SUBAREA RUNOFF(CFS) = 0.42 TOTAL AREA(ACRES) = 0.11 TOTAL RUNOFF(CFS) = 0.42 **************************************************************************** FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 3 »»>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »»>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<«< aBBB3B33SaaSattS3BBBaSS33BBBB3S38aSSasaaaB3aBBBaBaaS33aS3BBBBBSBBa ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OP FLOW IN 18.0 ISCR PIPE IS 2.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 2.8 UPSTREAM NODE ELEVATION - 303.20 DOWNSTREAM NODE ELEVATION = 302.80 FLOWLENGTH(FEET) > 40.00 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES'= 1 PIPEFLOW THRU SUBAREA(CFS) = 0.42 TRAVEL TIME(MIN.) = 0.24 TC(MIN.) = 8.10 **************************************************************************** FLOW PROCESS FROM NODE 51.00 TO NODE 51.00 IS CODE = 1 »»>DESIGNATE INDEPENDENT STREAM POR CONFLUENCE«<« BBBBBBBBBBSBBBBBaaaaBBBBBBBBBBSBBBBaSSSBBBBSBBBBBBBBBasaaaaSSaaSBSBBBBBBBBBB TOTAL NUMBER OF STREAMS = 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) » 8.10 RAINFALL INTENSITY(INCH/HR) = 5.41 TOTAL STREAM AREA(ACRES) - 0.11 PEAK FLOW RATE(CFS) AT CONFLUENCE = 0.42 **************************************************************************** FLOW PROCESS FROM NODE 123.00 TO NODE 51.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<«« BBBBBSaaSSaaaaBBBBBBBBBBSBaaaSaBSBBBBBBBBBBaaaaaaBBSaaaaaBBBBBSBBBBBBBBBBBBB SOIL CLASSIFICATION IS "D" MULTI-UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 INITIAL SUBAREA FLOW-LENGTH = 150.00 UPSTREAM ELEVATION = 313.00 DOWNSTREAM ELEVATION =310.10 ELEVATION DIFFERENCE = 2.90 URBAN SUBAREA OVERLAND TIME OF PLOW(MINUTES) = 7.079 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 5.895 SUBAREA RUNOFF(CFS) = 0.37 TOTAL AREA(ACRES) = 0.09 TOTAL RUNOFF(CPS) = 0.37 **************************************************************************** PLOW PROCESS FROM NODE 51.00 TO NODE 51.00 IS CODE =1 »»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE«<<< BaBBBBB«aaaSBBBBSSBBB«aBBBBSB33BBBBB33aaSS3S33S333aBBBB3aBBSSSSBaBBaBBBBBBB3 TOTAL NUMBER OF STREAMS = 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 7.08 RAINFALL INTENSITY(INCH/HR) = 5.90 TOTAL STREAM AREA(ACRES) - 0.09 PEAK FLOW RATE(CFS) AT CONFLUENCE = 0.37 **************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 201.00 IS CODE = 21 >»»RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW-LENGTH = 120.00 UPSTREAM ELEVATION = 313.00 DOWNSTREAM ELEVATION = 311.80 ELEVATION DIFFERENCE = 1.20 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) » 4.929 TIME OF CONCENTRATION ASSUMED AS 6-MINUTES 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 6.559 SUBAREA RUNOFF(CFS) = 2.12 TOTAL AREA(ACRES) = 0.38 TOTAL RUNOFF(CFS) = 2.12 **************************************************************************** FLOW PROCESS FROM HODE 201.00 TO NODE 51.00 IS CODE = 3 >»>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA««< »>»USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE PLOW)««< ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 4.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 6.1 UPSTREAM NODE ELEVATION = 303.50 DOWNSTREAM NODE ELEVATION = 302.80 FLOWLENGTH(FEET) = 30.00 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES PIPEFLOW THRU SUBAREA(CFS) = 2.12 TRAVEL TIME(MIN.) = 0.08 TC(MIN.) = 6.08 **************************************************************************** FLOW PROCESS FROM NODE 51.00 TO NODE 51.00 IS CODE = 1 »»>DESIGNATE INDEPENDENT STREAM FOR CONPLUENCE«<« »»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<«« BBBBSBBBBBBBBBBaBaBBBBBaBBaaaaaaaaaaaaaBBBBBBBBBaaaaaaasBBBBBBBBaaBBBBaaBaaa TOTAL NUMBER OF STREAMS - 3 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 3 ARE: TIME OF CONCENTRATION(MIN.) = 6.08 RAINFALL INTENSITY(INCH/HR) = 6.50 TOTAL STREAM AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.12 ** CONFLUENCE DATA ** STREAM RUNOFF To INTENSITY AREA NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE) 1 0.42 8.10 5.407 0.11 2 0.37 7.08 5.895 0.09 3 2.12 6.08 6.501 0.38 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 3 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH/HOUR) 1 2.81 6.08 6.501 2 2.68 7.08 5.895 3 2.53 8.10 5.407 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK PLOW RATE(CFS) • 2.81 Tc(MIN.) = 6.08 TOTAL AREA(ACRES) = 0.58 **************************************************************************** FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 3 »>»COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA«<« >»>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)«<<< BBBBBBBaBsaaaBBSBBaaaaBBBBBSBaaaBBassaaaaaEBasBBBBBSBBBBSBasBBBBBaBasaBBBBSB ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 DEPTH OF FLOW IN 18.0 INCH PIPE IS 3.8 INCHES PIPEFLOW VELOCITY(FEET/SEC.) = 10.4 UPSTREAM NODE ELEVATION = 302.80 DOWNSTREAM NODE ELEVATION = 298.60 FLOWLENGTH(FEET) = 50.00 MANNING'S N = 0.013 ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 2.81 TRAVEL TIME(MIN.) = 0.08 TC(MIN.) = 6.16 END OP STUDY SUMMARY: PEAK PLOW RATE(CFS) « 2.81 Tc(MIN.) = 6.16 TOTAL AREA(ACRES) = 0.58 SESaaBaBBBBBBaaaBBBBaBBBBBBaBaaBBBBSaaaBBBSBBSBBSBBBSS END OP RATIONAL METHOD ANALYSIS Calavera Hills Village "Y" Hydrology Study HYDRAULIC ANALYSIS System to Calavera Hills Village "X" & System to College Boulevard 18" Storm Drain 100-Year Design Storm ICamm k:\RiiofUUMI\4l\a03Jliic w.0. IMMI 7/2SIK)2 2:21PM Scenario: Storm Drain to Calavera Hills "X" C] Project Engineer. Hunsaker & Associates San Dlego, Inc. h:\stormcad\194l\4l\onsite.stnn Hunsaker & Associates StonnCAD v3.0 [319] 10/18/02 10:31:46 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203)755-1666 Pagelofi 36 Scenario: Storm Draffrto Calavera Hills "X" Pipe Report Label Upstream Downstream Total Length Constructed Section Mannings Capacity Average Upstream Downstream Hydraulic l-<ydraulic Node Node System (ft) Slope Size n (cfe) Velocity Invert Invert Grade In Grade Out Flow (ftm) (ft/s) Elevation Elevation (ft) (ft) (cfe) (ft) (ft) (ft) (ft) P-1 2 3 0.36 72.09 0.013733 18 inch 0.013 12.31 1.35 304.68 303.69 304.90 304.35 P-11 4 31 2.04 30.50 0.020000 18 inch 0.013 14.85 2.80 303.13 302.52 303.67 303.35 P-2 3 31 3.91 89.06 0.009432 18 inch 0.013 10.20 4.12 303.36 302.52 304.12 303.35 P-12 5 32 2.90 37.47 0.020016 18 inch 0.013 14.86 2.88 301.02 300.27 301.67 301.57 P-13 6 32 2.53 103.30 0.009971 18 inch 0.013 10.49 2.68 301.30 300.27 301.90 301.57 P-3 31 32 5.46 154.51 0.012426 18 inch 0.013 11.71 4.14 302.19 300.27 303.09 301.57 P-14 32 J-1 9.58 155.58 0.063054 18 inch 0.013 26.38 5.88 299.94 290.13 301.14 292.64 P-22 7 34 3.78 109.28 0.030655 18 inch 0.013 18.39 3.23 292.75 289.40 293.49 292.31 P-21 J-1 34 9.58 40.00 0.010000 18 inch 0.013 10.50 5.42 289.80 289.40 292.64 292.31 P-17 8 35 3.14 13.46 0.009658 18 inch 0.013 10.32 1.78 288.22 288.09 290.20 290.19 P-6 34 35 13.09 86.92 0.011275 18 inch 0.013 11.15 7.41 289.07 288.09 291.54 290.19 P-7 35 36 15.59 275.99 0.044676 18 inch 0.013 22.20 8.92 287.76 275.43 289.18 277.28 P-20 11 37 2.57 10.25 0.009756 18 inch 0.013 10.37 1.45 267.60 267.50 270.02 270.01 P-8 36 37 15.59 89.28 0.085125 18 inch 0.013 30.65 8.92 275.10 267.50 276.52 270.01 P-19 10 37 2.47 10.25 0.009756 18 inch 0.013 10.37 1.40 267.60 267.50 270.01 270.01 P-9 37 o-l 19.88 59.60 0.136745 18 inch 0.013 38.84 15.76 267.15 259.00 268.62 259.82 h:\stonncad\l 941\41 \onsite.stm 10/18/02 10:41:23 AM Project Engineen Hunsaker & Associates San Diego, Inc. Hunsaker & Associates StonnCAD v3.0 [319] ® Haestad Methods, Inc. 37 Brookskte Road Waterbury, CT 06708 USA (203)755-1666 Pagelofi >^l( PfVnie Scenario: Storm Drain to Calavera Hills "X" • lull mil• tl^t "ttJt's ^ \ • kintllKI • iiuii ' V lit "iV M ^^^^^ 1* V il^ AV H / ^ llMHtlttllS i> •! • 1 n M • 1 1 M « II t M -{/^^ ~ Wll ItkilftHIII* h:\stormcad\1941 \41\onsite.stm 10/18/02 10:35:00 AM Project Engineer Hunsaker & Associates San Diego, Inc. Hunsaker & Associates StormCAD v3.0 [319] ® Haestad Methods, Inc. 37 Brookskie Road Watert>ury, CT 06708 USA (203)755-1666 Pagelofi Ptanie Scenario: Storm Drain to Calavera Hills "X" Label: 32 Rim: 306.22 ft Label: 6 Rim: 305.34 ft Sump: 301.30 ft Label-P-1 3 LM SA 1 1 Up Inv n n Inv ert: 30' rp rt" n f .30 ft ) 9 7 f t UII INV Lengt Cll. O U V i: 103.3 R inrh 1 1 il 0 ft O 1 ^ C . S: 0.0 O III U II )9971J ' "\ / \ 307.00 306.00 305.00 304.00 303.00 302.00 301.00 300.00 Elevation (ft) 299.00 7+00 7+20 7+40 7+60 7+80 8+00 8+20 Station (ft) h:\stormcad\1941\41 Vonsite.stm 10/18/02 10:35:39 AM Project Engineer: Hunsaker & Associates San Diego, Inc. Hunsaker & Associates StonnCAD v3.0 [319] ® Haestad Methods, inc. 37 Brookskie Road Waterbury, CT 06708 USA (203)755-1666 Pagelofi p^l prenie Scenario: Storm Drain to Calavera Hills "X" Label: 35 Rim: 293.1 8 ft Sump: 287.76 ft Label: P-17 Up Invert: 288.22 ft Dn Invert: 2 88.09 ft Length: 13.46 ft Size: 1 8 inch S: 0.009658 ft/ft Label: 8 Rim:293.31 ft Sump: 288.22 ft 293.50 292.50 291.50 290.50 289.50 288.50 287.50 Elevation (ft) 4+24 4+40 h:\stonncad\1941V41 Vonsite.stm 10/18/02 10:36:46 AM Station (ft) Project Engineer Hunsaker 8i Associates San Diego, Inc. Hunsaker & Associates StomiCAD v3.0 [319] ® Haestad Methods, inc. 37 Brookskie Road Waterbury, CT 06708 USA (203)755-1666 Pagelofi Scenario: Proposed Storm Drain to College Blvd. 50 • P-1 51 P-2 52 -A h:\stormcadM941\41\college blvd.stm 10/18/02 10:37:25 AM ® Haestad Methods, Inc. Project Engineer Hunsaker & Associates San Diego, inc. Hunsaker & Associates StormCAD v3.0 [319] 37 Brookside Road Waterbury, CT 06708 USA (203)755-1666 Pagelofi Scenario: Proposed StOTm Drain to College Blvd. Pipe Report Label Upstream Node Downstream Node Total System Flow (cfe) Length (ft) Constructed Slope (flffi) Section Size Mannings n Capacity (cfe) Average Vetocity (ft/s) Upstream Invert Elevation (ft) Downstream Invert Elevation (ft) Hydraulic Grade In (ft) Hydraulic Grade Out (ft) P-1 P-2 50 51 51 52 0.42 2.81 40.50 49.47 0.009877 0.078431 18 inch 18 inch 0.013 0.013 10.44 29.42 2.60 3.09 303.55 302.48 303.15 298.60 303.79 303.12 303.36 299.60 h:\stormcad\194l\4l\college blvd.stm 10/18/02 10:39:22 AM Project Engineer Hunsaker & Associates San Diego, Inc. Hunsaker & Associates StomiCAD v3.0 [319] ® Haestad Methods, Inc. 37 Brookskie Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Profile Scenario: Proposed Storm Drain to College Blvd. Label: 52 Rim: 3 09.3 3 ft Sump: 298.6 0 ft Label: P-2 U p Invert: 3 02.4 8 ft Dn Invert: 2 98.6 0 ft Length: 49.47 ft Size: 18 in ch 8: 0.0 7 843 1 ft/ft Label: R im : 3 tl Sump: 312.00 Elevation (ft) 304.00 302.00 300.00 298.0 0 0+00 0+20 0+40 0+60 0 + 90 Station (ft) h:\stonncad\1941\41\college blvd.stm 10/18/02 10:40:33 AM ® Haestad Methods, Inc. Project Engineer Hunsaker & Assodates San Dlego, Inc. Hunsaker 8i Associates StormCAD v3.0 [319] 37 Brookside Road Waterbury, CT 06708 USA (203) 756-1666 Page 1 of 1 Calavera Hills Village T* Hydrology Study CURB INLET DESIGN JC»ui LArepBttUMmiVainjiic w.0. IMMI 7/2W02 2:21PM CALAVERA HILLS VILLAGE "Y" INLET SIZING Type Node Required Use of No. Q(cfs) Lengtti of Length^ Inlet Opening^ (ft.) (ft.) SUMP 4 2.04 1.02 5 SUMP 5 2.90 1.45 5 SUMP 6 2.53 1.27 5 SUMP 8 3.14 1.57 5 ' FROM EQUATION Q=0.7L(0.33+DEPTHr3/2 (San Diego Drainage Design Manual) 2 FROM CITY OF SAN DIEGO CHART 1-103.6C (San Diego Drainage Design Manual) 3 LENGTH SHOWN ON PLANS (REQ'D LENGTH OF OPENING + 1 FOOT). 5' MIN H:\EXCEL\1941\41\INLETS Calavera Hills Village'T Hydrology Study CURB INLET DESIGN JCanm LVqioiUUMmiWnjac W.II. IMMI 7/2W022:2tPM CALAVERA HILLS VILLAGE "Y INLET SIZING Type Node Required Use of No. Q(cfs) Length of Length^ Inlet Opening^ (ft.) (ft.) SUMP 4 2.04 1.02 5 SUMP 5 2.90 1.45 5 SUMP 6 2.53 1.27 5 SUMP 8 3.14 1.57 5 ' FROM EQUATION Q=0.7L(0.33+DEPTH)'^3/2 (San Diego Drainage Design Manual) 2 FROM CITY OF SAN DIEGO CHART 1-103.6C (San Diego Drainage Design Manual) 3 LENGTH SHOWN ON PLANS (REQ'D LENGTH OF OPENING + 1 FOOT). 5' MIN H:\EXCEL\1941U1\INLETS that certain requirements, as set forth in the CODE section, are satisfied. The requirements Include that general liability insurance and officers' and directors' liability insurance be carried by the Association in specified amounts. The Association shall maintain general liability insurance and officers' and directors' liability insurance in amounts which satisfy the requirements of the CODE to limit the liability of volunteer officers and directors of the Association. (i) Annual Insurance Review. The Board shall review the insurance carried by the Association at least annually, forthe purpose of determining the amount ofthe insurance referred to in this Article. The Board may obtain a current appraisal of the full replacement value of any improvements owned bythe Association, withoutdeduction for depreciation, by a qualified appraiser, priorto each annual review. Notwithstanding the requirement forannual review, the insurance policies carried by the Association shall, to the extent possible, provide for automatic adjustments of coverage levels to reflect the changes in costs resulting from inflation. (J) Additional Insurance. The Association may obtain such additional insurance coverage as its Board deems appropriate, including, but not limited to, coverage of its directors and officers. (k) Owners'Insurance. Itis not intended thatthe Association insurance policies cover any Lot and each Owner is responsible to obtain his or her own casualty and general liability insurance covering his or her Lot. Each Owner shall obtain and maintain, at his or her own expense, fire insurance coverage as may be required by the Owner's institutional Mortgagee or, if no institutional Mortgage encumbers the Lot, fire insurance in an amount not less than the replacement cost ofthe structure. (I) insurance Po//cyDeducl/b/e. In the event any insurance policy deductible amount relating to an Owner's property loss is charged to the Association, the Owner shall reimburse the Association upon written demand for the amount charged to the Association. Section 9.2. Condemnation. In the event the Common Area or any portion thereof shall be taken for public purposes by condemnation as a resultof any action or proceeding in eminent domain, or shall be transferred in lieu of condemnation to anyauthority entitled to exercise the powerof eminentdomain, then the award or consideration for such taking or transfer shall be paid to and belong to the Association. ARTICLE X MAINTENANCE RESPONSIBILITIES Section 10.1. Parties Responsible for Maintenance of Common Area and Association Maintenance Area. The foltowing parties shall be responsible to maintain the Common Area and Association Maintenance Area: (a) Initially Declarant or a Guest Builder shall be solely responsible to maintain the Common Area and the Association Maintenance Area. (b) Unless the deed of conveyance or a maintenance agreement between Declarant or a Guest Builder and the Association states otherwise, the Association shall become obligated to maintain the Common Area and Association Maintenance Area within a Phase upon the first close of escrow for the sale of a Lot within the Phase to a Retail Purchaser. The Common Area and Association Maintenance Area within a Phase shall refer to those porttons ofthe Common Area and Association Maintenance Area which are identified as being within such Phase by the Declaration of Annexation or the deed of conveyance. The Association Maintenance Area in a Phase may include areas within public rights-of-way such as medians and parkways or other off-site areas. Declarant or a Guest Builder and the Association may enter into one or more maintenance agreements in form and content acceptable to the California Department of Real Estate whereby Common Area or Association Maintenance Area maintenance or the costs of maintenance of the Common Area is shared between Declarant or a Guest Builderand the Association forthe term setforth in such agreement(s). It is not intended 5/27/03 - 24- 045600-0103 137091.3 thatthe Association be obligated to share in any such costs until conveyance of the first Lot within a Phase to a Retail Purchaser. Section 10.2. Association Maintenance. The Association shall maintain or caused to be maintained all Common Area and Association Maintenance Area in good repair and appearance as set forth in the Declaration and in accordance with any appltoable requirements. The Association shall not relinquish its obligatton to maintain the Common Area or Association Maintenance Area without the prior consent ofthe Planning Commission or City Council ofthe City. (a) The Association shall keep and maintain the Common Area and the Association Maintenance Area, and all improvements thereon, in good condition and good appearance at all times. For example, and not by way of limitation, the Association shallbe responsible to maintain any terrace drain or other drainage improvement that is located within Association Maintenance Area or Common Area. (b) The Associatton shall provide landscaping, pruning and gardening properly to maintain and pertodically replace when necessarythe trees, plants, grass and other vegetation origi- nally placed in areas it is obligated to maintain and to remove trash and debris from the Common Area and Association Maintenance Area. The Association shall take such maintenance acttons as are necessary to avoid erosion and to assure proper drainage of all areas it is obligated to maintain. The Association in its maintenance activities shall comply with any City (and any other applicable governmental) standards, requirements or restrictions which are applicable to the Project, including any City brush removal requirements and the City Landscape Guidelines and Irrigation Standards. All landscaping within the Common Area and Association Maintenance Area shall be maintained in a healthy and thriving condition, free from weeds, trash and debris and shall be maintained at least to the standards set by the City. Notwithstanding the foregoing, the Association shall at all times complywith any City open space regulations or other applicable restrictions pertaining to the Common Area or Association Maintenance Area. (c) The Association shall perform regular maintenance and repairs as required to Cost Center Amenities located within the Common Area or Association Maintenance Area. Cost Center Area amenities may include, but are not limited to, swimming pools, restrooms and spa. (d) The Association shall monitorand control the encroachment of invasive and exotic weeds into native coastal sage scrub and chaparral habitat con-idors. Such weeds shall be controlled both on the periphery of native corridors and in native revegetation and Fire Suppression Zones. The Association shall promptly eradicate invasive plants from such areas in order to preserve the growth of native plants (e.g., coastal sage scrub and chaparral). (e) The Association shall properly keep and maintain any detention basins within the Common Area or Association Maintenance Area in accordance with all applicable requirements of the City and all other govemmental agencies having jurisdiction. (f) Notwithstanding any vote of its Mem bers to the contrary, the Association shall be obligated to maintain each public area (e.g., parkway) designated by Declarant in this Declaration, a Declaration of Annexation or other recorded document to the level of maintenance at least equal to the level of maintenance performed bythe City or imposed by the City on othersimilar public areas. However, maintenance of any such public area bythe Associatton is subject to the City allowFng such maintenance. Commencing on the date the Association's regular assessments commence against the Lots in Phase 1, the Association shall maintain the landscaping within the public right-of-way areas shown on Exhibit "B" attached hereto. Section 10.3. Owner Maintenance. Each Owner shall at all times keep and maintain ina clean, safe and attractive condition all portions of his or her Lot and improvements thereon (except for any portion the maintenance of which is the responsibility of the Association, the City or an assessment district). -25-045600-0103 137091.3 (a) The improvements to be so maintained by each Owner include, but are not limited to, all portions ofthe residence, garage, the garage opener, lights on the residence, the landscaping, any fence or wall located on the Lot, any street tree located on the Lot, and the landscaping, any street tree and all improvements within the publto right-of-way between any sidewalk adjacent to the Owner's yard and a public street (other than any portion which is within the Common Area or Association Maintenance Area or which is maintained by the Cityor an assessment district). (b) Each Owner of a Lot shall water, weed, maintain and care for the landscaping located on his or her Lot (other than any portion whtoh is within the Common Area or Association Maintenance Area or which is maintained by the City or an assessment district) so that the same is at all times in a healthy, thriving and attractive condition, free from weeds, trash and debris. (c) The Association Maintenance Area may include landscape maintenance, but not irrigation, of parkways and certain stopes on Lots. The Owner of each such Lot shall be responsible for irrigating any such areas in accordance with a schedule adopted by the Association. (d) As provided in Section 8.20 above (entitled "Common Walls and Fences"), each Owner shall be responsible to maintain the interior surface of any fence or wall which separates the Owner's Lot from another Lot and both adjoining Owners shall be responsible to share equitably in the costs to repair or replace any such fence or wall which separates their Lots. However, an Owner shall not be responsible for the costs to repair or replace a fence which is damaged by the other Owner. (e) Each Owner shall be responsible to maintain any ten-ace drain, brow ditch or other drainage improvement which is tocated on such Owner's Lot unless the same lies within Association Maintenance Area. All such drainage improvements shall be kept free and clear of debris and obstructions. (f) Each Owner shall remove all rubbish, trash, garbage, weeds, debris and other waste material from such Owner's Lot. (g) No Owner shall interfere with or damage the Common Area or Association Maintenance Area, improve or alter the Common Area or Association Maintenance Area, or interfere with or impede Declarant, Guest Builders, the Association or a public maintenance assessment district in connectton with the maintenance ofthe Common Area or Association Maintenance Area. Section 10.4. Association's Right to Repair Neglected Lots and Right to Enter. In the event that any Owner shall in the Board's opinion permit any property which is the responsibility of such Owner to maintain to fail into a dangerous, unsafe, unsightly or unattractive condition as detennined bythe Board, then the Board shall have the right to demand that such condition be remedied. Should the condition not be remedied within fifteen (15) days, the Board shall have the right, but notthe obligation, to correct the condition, and to enter upon the portion ofthe Project which has fallen into such condition for the purpose of doing so. Further, ifan Owner fails or refuses to provide irrigation to landscaping within Association Maintenance Area on his or her Lot which it is the Owner's obligation to provide in accordance with the irrigation schedule established by the Association, the Board shall have the right, but notthe obligation, upon fifteen (15) days' prior written notice, to enterupon the Owner's Lotfor purposes of con-ecting such condition. The Owner shali promptly reimburse the Association for the cost of all corrective action, including, but not limited to, the Association's court costs and reasonable attorney's fees should the Board determine It is in its best interests to obtain a courtorder altowing such entrance bythe Board's representatives. No entry inside a residence may be made without the consent of the Owner. Section 10.5. Citv's Rights If Association Falls To Maintain. In the event the Association fails to maintain all or any portton of the Common Area or Association Maintenance Area in accordance with this Article, the City shall have the right, but not the duty, to perform the necessary maintenance. Ifthe City elects to perform such maintenance, the City shall give written nottoe to the Association, with a copy thereof to the Owners, setting forth with particularity the maintenance which the City finds to be required and requesting the same to be carried out by the Association within a pertod of thirty (30) days from the giving of such notice. In 5/27/03 -26- 045600-0103 137091.3 the event the Association fails to carry out such maintenance within the pertod specified by the City's notice, the City shall be entitled to cause such work to be completed and shall be entitled to reimbursement with respect thereto from the Owners as provided in Section 4.15 above. Section 10.6. Maintenance of Walls and Fences Separating Common Area or Association Maintenance Area From Lots. Unless a Declaration of Annexation or deed oreasement signed by Declarant states otherwise, the following provisions shall apply with respect to fences or walls designated as being fences or walls which are located within the Association Maintenance Area or which are located within Common Area and which separate the Association Maintenance Area or Common Area from an adjoining Lot: (a) Sound Walls. The Association shall be responsible to maintain the exterior sur&ce and to repair and replace the structure of any sound wall, including any glass portion thereof; provided, however, the Association shall not be obligated to clean the exterior surface of glass more frequently than once per calendar quarter. The Owner of the Lot on which the sound wall is located shall maintain the interior surfaces of the sound wall that face the Owner's residence, including the interior surface of any glass portion thereof. (b) Solid Masonry IVa//s. The Association shall be responsible to remove graffiti from the exterior surface of solid masonry walls. The Owner of the Lot on which the solid masonry wall is located shall be responsible for all other maintenance of such wall, including repair and replacement of the wairs structure. (c) Open Fencing. The Ownerof the adjoining Lot shall repair, replace and maintain the structure and all surfaces of any open fencing (e.g., "split rail fences" or open metal fences). Section 10.7. Reclaimed Water. It is currently intended thatthe Association will use reclaimed water for irrigatton purposes. Where the areas being in'igated are slopes, it is possible that reclaimed water will flow into the yards of those Lots adjoining the toe ofa slope. Reclaimed water is not potable and should not be consumed by people or animals. Reclaimed water may cause discoloring of fences or walls. Section 10.8. Fire Suppression. (a) Location of Flre Suppression Zones. The approximate locations of Fire Suppression Zones within the Properties are depicted on Exhibit "D" attached hereto. (b) Moditied Fire Suppression Zones. The Fire Suppression Requirements provide for modified Fire Suppression Zones on portions of Lots 1 through 22, inclusive, of CARLSBAD TRACT NO. 01-02 CALAVERA HILLS VILLAGE K and Lots 27 through 43, inclusive, of CARLSBAD TRACT NO. 01-06 CALAVERA HILLS VILLAGE X (the "Modified Flre Suppression Zone Lots"). The Fire Suppression Requirements for the Modified Fire Suppression Zone Lots permit the width of a modified Fire Suppression Zone 1 or 2 to be greater or less than twenty feet (20') as long as the combined width of modified Fire Suppression Zones 1 and 2 is forty feet (40'). The Calavera Hills Master Plan (MP-150(H)) contains requirements for structures and landscaping on the Modified Fire Suppression Zone Lots, including without limitatton, requirements for use of exterior fire resistive building materials. All landscaping and any modificatton, constructton or reconstructton of improvements on the Modified Fire Suppression Zone Lots shall comply with all applicable City requirements, including those set forth in the Calavera Hills Master Plan (MP-150(H)). (c) Maintenance by Owners. Each Owner of a Lot on which a Fire Suppression Zone is located shall maintain his or her Lot in accordance with the Fire Suppression Requirements and the Calavera Hills Master Plan (MP-150(H)). Brush clearance required by the Fire Suppresston Requirements may change the character and appearance of the Project, and neither Declarant nor Guest Buikiers shall be liable to any Owner for work performed in compliance with the Fire Suppression Requirements. There is no guarantee or assurance that compliance with the Fire Suppression Requirements will prevent damage or destruction by fire. -27-045600-0103 137091.3 (d) Maintenance by Association. The Association shall perform or cause to be performed brush management annually by May 15 of each year, in strict compliance with the Fire Suppression Requirements, and shall comply with all other applicable requirements of the Fire Suppression Requirements. (e) Restr/cf/ons.To reduce fire hazards, construction, improvements and vegetation within Fire Suppression Zones are restricted. Each Ownerof a Loton which a Fire Suppression Zone is located shall at all times comply with the applicable Fire Suppression Requirements. The Association shall at all times complywith the applicable Fire Suppresston Requirements with respect to any Common Area or Association Maintenance Area on which a Fire Suppression Zone is located. For example, as of the date of this Declaration, the modified Fire Suppression Zone 1 on Modified Fire Suppression Zone Lots isa non-combustible fire zone. No combustible structures, fences, trees, shrubs, or anything whatsoever of a combustible nature may be constructed, placed or stored within the modified Fire Suppression Zone 1 area; only fire retardant plants are permitted in such area. Exhibit "E" attached hereto describes certain requirements and restrictions that are, as ofthe date of this Declaration, applicable to Fire Suppression Zones. (Exhibit "E" refers to modified Fire Suppression Zones 1, 2 and 3 as Zones C-1, C-2 and C-3, respectively.)The requirements setforth on Exhibit "E" are subject to change bythe City from time to time. This Subsection (e) shall not be amended without the prior written consent of the City, as provided in Section 13.3 below. Section 10.9. Maintenance Manuals. Declarant or Guest Builders may provide their respective original purchasers and/or the Association with manuals ("M aintenance M anuais") which outline Declarant's, the Guest Builder's or manufacturers' recommended homeowner and/or Association maintenance obligations and schedules. (a) Each Owner who receives a Maintenance Manual shall provide the same to any purchaser or other transferee of his or her Lot. (b) The Association shall keep and make available to any Owner the Maintenance Manual(s) provided by Declarant or a Guest Builder (including any Maintenance Manual which pertains to Association or Owner maintenance). The Association shall have the rightto require an Owner to reimburse the Association for its costs of copying any such Maintenance Manual which the Association provides to an Owner. (c) The Association and each Owner, respectively, shall follow the recommendattons set forth in the appltoable Maintenance Manual provided by Declarantor a Guest Builder, as the same may be updated from time to time. Section 10.10. Mold: Mildew. The Association, with respect to the Com mon Area and Association Maintenance Area, and each Owner, with respect to his or her Lot, shall take all reasonable and appropriate steps to prevent conditions that may cause mold or mildew to devetop, including following any recommendations contained in the Maintenance Manual or in any applicable publications of the California Department of Health Services ("DHS") or the United States Environmental Protection Agency ("EPA"). As of the date of this Declaration, the EPA and DHS have Web sites that contain information and publications regarding mold and other biological pollutants. For example, see "Btological Pollutants in Your Home" and "Mold Resources" on the EPA Web site (http://www.epa.gov); and "Indoor Air Quality Info Sheet: Mold in My Home: What Do I Do" on the DHS Web site (http://www.dhs.ca.gpv). An Owner shall promptly report to the Association any evidence the Owner may discover of moisture accumulation or mold in the Project. Section 10.11. Owner Responsible for Damages If Fails to Maintain. Any Owner who fails to fulfill his or her maintenance obligations or to follow the maintenance recommendattons for his or her Lot or residence set forth in a Maintenance Manual shall be responsible for any damage which results to his or her Lot or residence, the Common Area, the Association Maintenance Area or any other Lot. -28-045600-0103 137091.3 Section 10.12. Limitation on Liabilitv of Association's Directors and Officers. (a) Claims Regarding Breach of Duty. No director or officer of the Association shall be personally liable to any of the Association's members, or to any other person, for any error or omission in tlie discharge of their duties and responsibilities or for their failure to provide any services required hereunder or underthe Bylaws, provided that such director or officer acted in good faith, in a manner that such a person believes to be in the best interest of the Association and with such care, including reasonable inquiry,as an ordinary prudent person in a like position would use undersimilar circumstances. Without limiting the generality of theforegoing, this standard of care and limitation of liability shall extend to matters including, but not limited to, the repair and maintenance of Common Area and Association Maintenance Area.. (b) other Claims Involving Tortious Acts and Property Damage. No director or officer of tlie Association shall be responsible to any Owner or any member of its family or tenants, guests, servants, employees, licensees, invitees, or any other person for any loss or damage suffered by reason of theft or othenivise of any article, vehicle or other item of personal property which may be stored by such Owner or other person on or within any Lot or for any injury to or death of any person or loss or damage to the property of any other person caused by fire, explosion, the elements or any other Owner or person within the Project, or by any other cause, unless the same is attributable to his or her own willful or wanton act of gross negligence. It is the intent of this section to provide volunteer directors and officers with protection from liability to the full extent permitted by California CIVIL CODE Section 1365.7, or comparable superseding statute, and to the extent this provision is inconsistent with said section, the CIVIL CODE shall prevail. Section 10.13. indemnification of Association. Each Owner, personally and for its family mem bers, contract purchasers, tenants, guests and invitees, agrees to indemnify each and everyotherOwner and the Association, and to hold harmless such Owners and the Association from, and to defend him against, any claim of personal injury or property damage occurring within the residence or Lot of that Owner arising out of the failure of the Owner to maintain the Lot as set forth herein, except where another Owner's or the Association's negligence or willful misconduct is the sole and exclusive cause of any claim, demand or cause of action. ARTICLE XI ANNEXATION Section 11.1. By Association. Additional residential property. Common Area and Association Maintenance Area may be annexed to the Project and to the Declaration upon the vote or written assent of two-thirds (2/3) of the voting power of Members of the Association, excluding the vote of Declarant. Upon approval by Members of the Association, the owner of the property wishing it to be annexed m ay fito of record a Notice of Declaration of Annexation which shall extend the provisions of this Declaration to the property being annexed. Section 11.2. Bv Declarant. Additional land within the Annexable Property may be annexed to the Project as Lots, Common Area and Association Maintenance Area and to the jurisdiction of the Associa- tton by Declarant. Annexation shall be made by a Deciaratton of Annexation executed by Declarant and the owner of the land being annexed. The Declaration of Annexation may be revoked or amended at any time before the first close of sale of a Lot in the annexed property and may contain additional or different restrictions applicable to the annexed property. The obligation of Lot Owners to pay dues to the Association and the right of such Lot Owners to exercise voting rights in the Association in such annexed property shall not commence until the first day of the month following close of the first sale of a Lot by Declarant in that particular Phase of development. Any Phase or portion thereof may be deannexed by Declarant signing and recording with the County Recorder ofthe County a Notice of Deannexation which describes the land to be de-annexed provided that no Lot within the Phase has been conveyed to an Owner (other than between Declarants or to a successive Declarant). -29- 045600-0103 137091.3 Calavera Hills II Resource Agency Permits Regional Water Quality Control Board Order No. R98-2002-0014 Waste Discharge Requirements and Section 401Certification Dated February 13,2002 Fish and Wildlife Service Biological Opinion-Section 7 FWS Consultation No. FWS-SDG-1597.4 Dated March 14,2002 Department of Army-Section 404 Permit No. 200100215-RLK Dated May 15,2002 Department of Fish and Game Streambed Alteration Agreement Pursuant to Section 1601 of California Fish and Game Code #R5-2001-00074 Dated June 3,2002 \ 1^ California Regional Water Quality Control Board I 1 \ \ \ I i I I Winston H. Hickox Secretary for Environmental Protection San Diego Region Internet Address: http://www.swicb.ca.gov/-rwqcb9/ 9174 Sky Park Court, Suite 100, San Diego, CaUfomia 92123 Phone (858) 467-2952 • FAX (858) 571.6972 Gray Davij Governor February 14,2002 Jf x!^'"]!^"'^ In Reply Refer to: McMiUm Companies 401- ooC-135 2727 Hoover Ave, §LB National City, CA 91950 Mr. David Hauser CityofCarlsbad 1635 Faraday Avenue Carlsbad, CA 92008-7314 Dear Mr. Milich and Mr. Hauser: RE: ORDER NO. R9.2002-0014, WASTE DISCHARGE REQUIREMENTS AND SECTION 401 WATER QUALITY CERTIFICATION FOR CALAVERA HILLS H LLC AND CITY OF CARLSBAD, CALAVERA HILLS MASTER PLAN PHASE H' BRIDGE AND THOROUGHFARE DISTRICT NO. 4, AND DETENTION BASINS' Enclosed please fmd a copy of Order No. R9-2002-0014, which the Regional Board adopted at their regularly scheduled February 13,2002 meeting. (858)637^5594 regarding the above, please contact Ms. Stacey Baczkowski at Respectfully, )HNH. ROBERTUS Executive Officer Enclosure: Order No. R9-2002-0014 California Environmental Protection Agency Mr. Milich and Mr. Hauser . 2 - c v ... ^ February 14,2002 DISTRIBUTION Ms. Shannon Bryant U.S. Army Corps of Engineers San Diego Field Office 16885 West Bemardo Drive, Suite 300A San Diego, CA 92127 Ms. Tamara Spear Califomia Department of Fish and Game South Coast Region 4949 Viewridge Avenue San Diego, CA 92123 Mr. John Martin U.S. Fish and Wildlife Service 2730 Loker Avenue West Carlsbad, CA 92008 CaUfomia Environmental Protection Agency Recycled Paper CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD SANDIEGO REGION ERRATA SHEET NO. I FOR ORDER NO. R9-2002-0014 WASTE DISCHARGE REQUIREMENTS AND SECTION 401 WATER QUALITY CERTIFICATION FOR CALAVERA HILLS II, LLC AND CITY OF CARLSBAD CALAVERA HILLS MASTER PLAN PHASE II & BRIDGE AND THOROUGHFARE DISTRICT NO. 4 & DETENTION BASINS SANDIEGO COUNTY The following changes were made at the request of the applicants. Deletions are indicated by strike-outs and additions are indicated by underlines. Finding No. 1 McMillin CompaniesCalavera Hilk^ T.TC and the City of Carlsbad (hereinafter discharger) submitted an application for 401 Water Quality Certification on December 4,2000, and an Application/Report of Waste Discharge on September 12,2001. The discharger proposes to construct 781 residential units and associated infrastmcture, extend College Boulevard and Cannon Road, and constmct two detention basins within the City of Carlsbad, Califomia. Finding No. 3 To mitigate for the permanent and temporarv fill of 3.77 acres of waters of the United States and State, the discharger will create a total of 44^10.7 acres of southem willow scmb adjacent to Calavera and Little Encinas Creeks. Finding No. 4 The proposed Habitat Restoration and Monitoring Plan (RECON; Octobor 26. 2001Januarv 10. 2002) will adequately compensate for impacts to waters of the U.S. and State associated with the discharge of fill material. rr IS HEREBY ORDERED that McMillin CompaniooCalavera Hills. LLC and the City of Carlsbad (hereinafter, discharger), in order to meet the provisions contained in Division 7 ofthe Califomia Water Code and regulations adopted thereunder, shall comply with the following: Errata Sheet No. 1 for Order R9-2002-0014 Provision Bl The discharger shall develop a Final Mitigation and Monitoring Plan for Regional Board approval, that shall be consistent with the Habitat Restoration and Monitoring Plan (RECON; Octobor 26.20QlJanuarv 10.2002). and shall achieve the following performance standards: Provision B2 a. Proposed channel designs and earthwork for all mitigation areas, including appropriate cross sections and plan views; b. A detailed planting plan, including species lists, plant sizes and numbers, and planting designs; c. An irrigation plan; d. Specific details and plans for all creek sections that will be culverted, bridged, or otherwise crossed or immediately adjoined by paths, stmctures, or similar improvements; e. Signage and barrier designs (as Ghown in Attachment 1) adequate to prevent intmsion by golforo, golf carts, and other human intmoion into all creeks and creek buffer zones; f. Specific details regarding hydrologic and biogeochemical monitoring, including sample locations, periodicity, and qualitative and quantitative indicators; and g. All other information, as appropriate. Provision B9 The discharger shall provide certification that personnel have been trained on the provisions and prohibitions of this order as well as the management responsibilities detailed in the Habitat Restoration and Monitoring Plan (RECON; Octobor 26. 2001Januarv 10.2002). Provision C8 The maintained portions of dSetention basins BJ and BJB shall not be counted towards mitigation credit for impacts to waters of the U.S. and State, and shall be maintained in accordance with the conditions specified in Attachment 1, or in a manner that provides equivalent protection. Attachment 1 The following headings were added to the table (from left to right): Village or Road Segment; Post Constmction BMP; BMP Maintenance; Maintenance ResponsibiUty; Anticipated Pollutants: and Anticipated BMP Efficiency. The third column on Attachment 1 on the Basin BJB row (last page of the table) was changed to "...and outlet as needed downstream of outlet pipe from College Boulevard." The last row refers to Basin BJB and was changed to identify Basin BJ. CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD SAN DIEGO REGION ORDER NO. R9-2002-0014 WASTE DISCIIARGE REQUIREMENTS AND SECTION 401 WATER QUALITY CERTIFICATION FOR CALAVERA HILLS H, LLC AND CITY OF CARLSBAD CALAVERA HILLS MASTER PLAN PHASE II & BRIDGE AND THOROUGHFARE DISTRICT NO. 4 & DETENTION BASINS SANDIEGO COUNTY The Califomia Regional Water Quality Control Boani, San Diego Region (hereinafter Regional Board) finds that: 1. McMillin Companies and the City of Carlsbad (hereinafter discharger) submitted an appUcation for 401 Water Quality Certification on December 4,2000, and an Application/Report of Waste Discharge on September 12,2001. The discharger proposes to constmct 781 residential units and associated infrastmcture, extend College Boulevard and Cannon Road, and constmct two detention basins within the City of Carlsbad, Califomia. 2. The project will result in the discharge of waste, defined as the placement of fill material (e.g., soil, riprap, culverts), into 3.7 acres of waters of the United States, and an additional 0.07 acre of waters of the State, including Calavera Creek, Agua Hedionda Creek, Little Encinas Creek, and unnamed vegetated and unvegetated waters of the U.S. The project's direct impacts (in acres) are as follows: Master Plan Development Cannon Road Colleee Boulevard Habitat Type"* Perm. Temp. Perm. Temp. Perm. Temp. Total Alkali Marsh 0.1 0.6 0.07 0.77 Riparian Scrub 0.2 0.03 0.3 0.02 0.55 (m£s or sws) 0.55 Sycamore Woodland 0.6 0.12 1.3 0.15 2.17 Unvegetated waters 0.2 0.01 0.21 Total 0.3 0.01 1.4 0.22 1.6 0.17 3.7 •* mfs = mule fat scrub; sws = southem willow scrub 3. To mitigate for the pennanent fill of 3.77 acres of waters of the United States and State, the discharger will create a total of 11.6 acres of southem willow scmb adjacent to Calavera and Order R9-2002-0014 Little Encinas Creeks. 4. The proposed Habitat Restoration and Monitoring Plan (RECON; October 26,2001) will adequately compensate for impacts to waters of the U.S. and State associated with the discharge of fill material. 5. The project may indirectly impact beneficial uses of waters of the U.S. and State through the discharge of urban mnoff pollutants (e.g., oil and grease, heavy metals, pathogens, nutrients, etc.) from the proposed development. 6. The discharger has developed a Summary Storm Water Pollution Prevention Plan (O'Day Consultants; August 2001) that identifies constmction and post-constmction Best Management Practices (BMPs). Post-constmction BMPs identified in the plan include: a. Creation of detention basins that wiU be used during constmction and will remain in place as post-constmction BMPs to receive urban mnoff; b. Grass-lined swales around individual house pads; c. Routine street sweeping by the City of Carlsbad; d. Storm drain inlet filters; and e. Constmction of pollution basins (e.g., treatment wetland). More specific BMPs are provided in Attachment 1 to this Order. 7. This Order specifies Waste Discharge Requirements (WDRs) that are necessary to adequately address impacts to water quality standards resulting from the filling of waters of the U.S., to meet the objectives of the State Wetlands Conservation Policy (Executive Order W-59-93), and to accommodate and require appropriate changes over implementation of the project and its construction. 8. The Comprehensive Water Quality Control Plan for the San Diego Basin (9) (Basin Plan) was adopted by the Regional Board on March 17,1975. Subsequent revisions to the Basin Plan have also been adopted by this Regional Board and approved by the State Board. The Basin Plan designates beneficial uses, narrative and numerical water quality objectives, and prohibitions which are applicable to the discharges regulated under this Order. The project, as described in this Order, will not result in State Water Quality Standards being exceeded. 9. The discharger has avoided and minimized impacts to waters of the U.S. consistent with the requirements of the Basin Plan. 10. The City of Carlsbad prepared an Environmental Impact Report (ETR) pursuant to the Califomia Environmental Quality Act and was certified on January 15,2002. The EIR identified the fbllowing mitigation measures to reduce project impacts to water quality below a level of significance: Order R9-2002-0014 a. Comply with State Water Resources Control Board Water Quality Order No. 99-08- DWQ, the NPDES General Pemiit for Storm Water Discharges Associated with Constmction Activity; b. Comply with the Municipal Storm Water Permit (NPDES No. CAS0108758); c. Comply with the City of Carlsbad procedures; d. Create desiltation basins where necessary to minimize erosion and prevent sediment transport, until the storm drain system is in place and streets are paved; e. Landscape all exposed, manufactured slopes per City of Carlsbad erosion control standards; and f. Phase grading operations and slope landscaping to reduce the susceptibility of slopes to erosion; and control sediment production from graded building pads with low perimeter berms, desiltation basins, jute matting, sandbags, bladed ditches, or other appropriate methods. 11. The Board has notified the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, Cahfomia Department of Fish and Game, and interested agencies and persons of its intent'to prescribe WDRs and Section 401 Water Quality Certification for this discharge. 12. The Board, in a public meeting, heard and considered all comments pertaining to the discharge. rr IS HEREBY ORDERED that McMillin Companies and the City of Carlsbad (hereinafter, discharger), in order to meet the provisions contained in Division 7 of the Califomia Water Code and regulations adopted thereunder, shall comply with the following: A. PROHIBITIONS 1. The discharge of fill material in a manner other than as described in the findings of this Order is prohibited unless the discharger obtains revised waste discharge requirements that piovide for the proposed change. 2. The discharge of fill material and other waste shall not create a pollution, contamination or nuisance, as defined by Section 13050 of the Califomia Water Code B MITIGATION PROVISIONS 1. The discharger shall develop a Final Mitigation and Monitoring Plan for Regional Board approval, that shall be consistent with the Habitat Restoration and Monitoring Plan (RECON; October 26,2001), and shall achieve the following performance standaids: a. The created and restored areas must posses the three criteria (wetland hydrology, hydrophytic vegetation, and hydric soils) necessaiy to be delineated as a Corps jurisdictional area; b. All sites must exhibit signs or evidence of wildlife use for two consecutive monitoring periods; Order R9-2002-0014 c. All sites must be self-sustaining; and d. All sites must exhibit evidence of natural recmitment of native wetland and/or riparian species. 2. The Final Habitat Restoration and Monitoring Plan shall include, but not be limited to, the following: a. Proposed channel designs and earthwork for all mitigation areas, including appropriate cross sections and plan views; b. A detailed planting plan, including species lists, plant sizes and numbers, and planting designs; c. An irrigation plan; d. Specific details and plans for all creek sections that will be culverted, bridged, or otherwise crossed or immediately adjoined by paths, stmctures, or similar improvements; e. Signage and bairier designs (as shown in Attachment 1) adequate to prevent intmsion by golfers, golf carts, and other human intmsion into all creeks and creek buffer zones; f. Specific details regarding hydrologic and biogeochemical monitoring, including sample locations, periodicity, and qualitative and quantitative indicators; and g. All other information, as appropriate. 3. Implementation of mitigation shall provide the following functional gains: a. Habitat function - Creation of stmcturally and spatially diverse habitat surrounding riparian areas wiU provide nesting and foraging grounds for birds, amphibians, and other wildlife. b. Biogeochemical/water quality functions - Expansion of wetland areas shall increase areas for natural water quality functions, such as microbial action that removes toxins, nitrogen, and other nutrients from mnoff. c. Hydrologic functions - Expansion of wetland areas will allow greater flood flow attenuation, energy dissipation, and storage during storm events. 4. Not later than 30 days prior to the beginning of grading, the discharger shall submit, acceptable to the Regional Board, the Final Habitat Restoration and Monitoring Plan. 5. The discharger shall implement the Final Wetland and Riparian Mitigation and Monitoring Plan as approved by the Regional Board. The final plan shall be consistent with the draft plan included as Attachment 2 to this Order. 6. Implementation of the Final Mitigation and Monitoring Plan shall be completed within the same calendar year as impacts occur, or at least no later than 9 months following the close of the calendar year in which impacts first occur (e.g., if impacts occur in June 2001, constmction of mitigation for all impacts must be completed no later than September 2002). Order R9-2002-0014 7. No later than 30 days prior to the beginning of clearing, gmbbing, and/or grading, the discharger shall submit, acceptable to the Regional Board, the name(s) and qualification(s) of the qualified biologist(s) (defined as possessing a college degree in the biological sciences and at least 5 years restoration experience in southem Califomia) responsible for compliance with the certification requirements, as discussed in the above provisions. 8. If mitigation areas do not meet their interim and/or ultimate success criteria, as defined in the draft Habitat restoration and Monitoring Plan, the discharger shall prepare, acceptable to the Regional Board, remedial measures to be implemented. 9. The discharger shall provide certification that personnel have been trained on the provisions and prohibitions of this order as well as the management responsibihties detailed in the Habitat Restoration and Monitoring Plan (RECON; October 26,2001). 10. Not later than 60 days following the completion of the installation of the mitigation areas, the discharger shall submit, acceptable to the Regional Board, final conservation easements or deed restrictions for all mitigation and preservation areas. 11. The discharger shall submit an as-built report within 60 days of installation of the proposed mitigation. C. SECTION 401 WATER QUALITY CERTIFICATION PROVISIONS 1. Standard conditions applicable to 401 Water Quality Certification: a. Every certification action is subject to modification or revocation upon administrative or judicial review, including review and amendment pursuant to CWC §13330 and 23 CCR §3867. b. Certification is not intended and shall not be constmed to apply to any activity involving a hydroelectric facility and requiring a Federal Energy Regulatory Commission (FERC) license or an amendment to a FERC license unless the pertinent certification application was filed pursuant to 23 CCR §3855(b) and that application specifically identified that a FERC license or amendment to a FERC license for a hydroelectric facility was being sought. c. Certification is conditioned upon total payment of any fee required pursuant to 23 CCR §3833 and owed by the discharger. 2. Any proposed change in constmction that may alter flow pattems and/or change the approved impact footprint is prohibited without Regional Board approval. Not later than 30 days prior to the beginning of any proposed change, the discharger shall submit, acceptable to the Regional Board, detailed plans and specifications showing the proposed change in relationship to the approved project. Order R9-2002-0014 3. The discharger is prohibited from maintaining (e.g., mowing, pmning, etc.) riparian vegetation within Agua Hedionda Creek for the purposes of increasing the hydrologic capacity of the creek or to provide protection to the proposed bridge. 4. All waters of the United States and State that are to be preserved shall be fenced no less than 10 days prior to the start of any clearing and/or grading activities. A qualified biologist shall show all preservation areas to all constmction personnel and shall explain the conditions of this Order and other permits regarding impacts. 5. The discharger shall staff a qualified biologist on site during project constmction to ensure compliance with the certification requirements. The qualified biologist shall be onsite at least once a week when grading and/or constmction activities occiu- more than 100 feet from a waters of the U.S. or State that is to be preserved. When grading and/or constmction activities occur within 100 feet of a waters of the U.S. or State that is to be preserved, the biologist shall be onsite daily. The biologist shall be given the authority to stop all work onsite if a violation occurs or has the potential to occur. 6. Not later than 30 days prior to the beginning of grading, the discharger shall submit, acceptable to the Regional Board, a detailed Final Water Quality Plan. This plan shall include, but not be Umited to, identification of pollutants expected to be generated by the proposed project identification of specific Best Management Practices, their treatment efficiency with regards to expected poUutants, specific locations, specific maintenance requirements, and maintenance responsibilities. Implementation of the Final Water Quality Plan shall occur in conjunction with project initiation. 7. The discharger shall notify the Regional Board in writing at least 15 days prior to actual start dates for each project component (e.g., clearing, gmbbing, grading, installation of mitigation). 8. Detention basins BJ and BJB shall not be counted towards mitigation credit for impacts to waters of the U.S. and State, and shall be maintained in accordance with the conditions specified in Attachment 1, or in a manner that provides equivalent protection. D. STANDARD PROVISIONS 1. The discharger shall notify the Regional Board by telephone within 24 hours whenever an adverse condition occurs as a result of this discharge. Such a condition includes, but is not limited to, a violation of the conditions of this Order, a significant spill of petroleum products or toxic chemicals, or damage to control faciUties that would cause noncompUance. Pursuant to CWC § 13267(b), a written notification of the adverse condition shall be submitted to the Board within one week of occurrence. The written notification shall identify the adverse condition, describe the actions necessary to remedy the condition, and specify a timetable, subject to the modifications of the Regional Board, for the remedial actions. Order R9-2002-0014 2. The discharge of any hazardous, designated or non-hazardous waste as defined in Title 23, Division 3, Chapter 15 of the Califomia Administrative Code, shall be disposed of in accordance with applicable state and federal regulations. 3. This Order is not transferable to any person except after notice to the Regional Board. In accordance with CWC §13260, the discharger shall file with the Board a report of any material change or proposed change in the ownership, character, location, or quantity of this waste discharge. The notice must include a written agreement between the existing and new discharger containing a specific date for the transfer of this Order's responsibility and coverage between the current discharger and the new discharger. This agreement shall include an acknowledgment that the existing discharger is liable for violations up to the transfer date and that the new discharger is liable from the transfer date on. Any proposed material change in operation shall be reported to the Regional,Board at least 30 days in advance of the proposed implementation of any change. This shall include, but not be Umited to, all significant new soil disturbances, all proposed expansion of development, or any change in drainage characteristics at the project site. For the purpose of this Order, this includes any proposed change in the boundaries of the wetland/waters of the United States fill sites. The Regional Board may require modification or revocation and reissuance of this Order to change the name of the discharger and incorporate such other requirements as may be necessary under the Califomia Water Code. 4. The discharger shall maintain a copy of this Order at the project site so as to be available at all times to site operating personnel and agencies. 5. The discharger shall permit the Board or its authorized representative at all times, upon presentation of credentials: a. Entry onto project premises, including all areas on which wetland fill or wetland mitigation is located or in which records are kept. b. Access to copy any records required to be kept under the terms and conditions of this Order. c. Inspection of any treatment equipment, monitoring equipment, or monitoring method required by this Order. d. SampUng of any discharge or surface water covered by this Order. 6. This Order does not authorize commission of any act causing injury to the property of another or of the public; does not convey any property rights; does not remove Uability under federal, state, or local laws, regulations or mles of other programs and agencies, nor does this Order authorize the discharge of wastes without appropriate pennits from other agencies or organizations. 7. The Regional Board will consider recission of this Order upon notification of successful completion of mitigation for all creation, and enhancement projects required or otherwise permitted now or subsequently under this Order, completion of project constmction, and the Regional Board's acceptance of these notifications. Determination of mitigation success will Order R9-2002-0014 be based on the provisions discussed above. 8. The discharger must comply with all conditions of this Order. Any noncompUance with this Order constitutes a violation of the Califomia Water Code and is grounds for (a) enforcement action; (b) termination, revocation and reissuance, or modification ofthis Order; or (c) denial of a report of waste discharge in application for new or revised waste discharge requirements. 9. The discharger shall report any noncompUance which may endanger health or the environment. Any such information shall be provided orally to the Regional Board within 24 hours from the time the discharger becomes aware of the circumstances. A written submission shall also be provided within five days of the time the discharger becomes aware of the circumstances. The written submission shall contain a description of the noncompliance and its cause; the period of noncompUance, including exact dates and times, and if the noncompliance has not been corrected; the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent recurrence of the noncompliance. The Regional Board, or an authorized representative, may waive the written report on a case-by-case basis if the oral report has been received within 24 hours. 10. The discharger shall take all reasonable steps to minimize or correct any adverse impact on the environment resulting from noncompliance with this Order, including such accelerated or additional monitoring as may be necessary to determine the nature and impact of the noncompliance. 11. In an enforcement action, it shall not be a defense for the discharger that it would have been necessary to halt or reduce the permitted activity in order to maintain compUance with this Order. Upon reduction, loss, or failure of the treatment faciUty, the discharger shall, to the extent necessary to maintain compUance with this Order, control production or all discharges, or both, until the facility is restored or an altemative method of treatment is provided. This provision applies for example, when the primary source of power of the treatment facility is failed, reduced, or lost. 12. This Order may be modified, revoked and reissued, or terminated for cause including, but not limited to, the following: a. Violation of any terms or conditions of this Order; b. Obtaining this Order by misrepresentation or failure to disclose fully all relevant facts; or c. A change in any condition that requires either a temporary or permanent reduction or eUmination of tiie authorized discharge. 13. The filing of a request by the discharger for the modification, revocation and reissuance, or temiination of this Order, or notification of planned changes or anticipated noncompUante does not stay any condition of this Order. Order R9-2002-0014 E. REPORTING AND RECORD KEEPING REQUIREMENTS 1. The discharger shall submit copies of all necessary approvals and/or permits for the project and mitigation projects from applicable govemment agencies, including, but not limited to, the Califomia Department of Fish and Game, U.S. Fish and Wildlife Service, and U.S. Army Corps of Engineers, prior to tiie start of clearing/grading. 2. The discharger shall retain records of all monitoring information, including all calibration and maintenance records, copies of all reports required by this Order, and records of all data used to complete the application for this Order. Records shall be maintained for a minimum of five years from the date of the sample, measurement, report, or application. This period may be extended during the course of any unresolved Utigation regarding this discharge or when requested by the Regional Board. 3. The discharger shall fumish to the Regional Board, within a reasonable time, any information which the Regional Board may request to detemiine whether cause exists for modifying, revoking and reissuing, or terminating this Order. The discharger shall also fiimish to tiie Regional Board, upon request, copies of records required to be kept by this Order. 4. Where tiie discharger becomes aware that it failed to subniit any relevant facts in a Report of Waste Discharge or submitted incorrect information in a Report of Waste Discharge or in any report to the Regional Board, it shall promptly submit such facts or information. 5. All applications, reports, or information submitted to the Regional Board shall be signed and certified as follows: a. The Report of Waste Discharge shall be signed as follows: i For a corporation - by a principal executive officer of at least the level of vice- president. ii For a partnership or sole proprietorship - by a general partner or the proprietor, respectively. iii For a municipality, state, federal or other pubUc agency - by either a principal executive officer or ranking elected official. b. All other reports required by this Order and other information required by the Regional Board shall be signed by a person designated in paragraph (a) of this provision, or by a duly authorized representative of that person. An individual is a duly authorized representative only if: i The authorization is made in writing by a person described in paragraph (a) of this provision; and ii The authorization specifies either an in(iividual or a position having responsibiUty for the overall operation of tiie regulated facihty or activity; and iii The written authorization is submitted to the Regional Board. c. Any person signing a document under tiiis Section shall make tiie following certification: Order R9-2002-0014 "I certify under penalty of law that I have personally examined and am familiar with the information submitted in this document and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is tme, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment." 6. The discharger shall submit reports required under this Order, or other information required by the Regional Board, to: Executive Officer California Regional Water Quality Control Board San Diego Region 9174 Sky Park Court, Suite 100 San Diego, Califomia 92123 F. NOTIFICATIONS 1. This Order does not convey any property rights of any sort or any exclusive privileges. The requirements prescribed herein do not authorize the commission of any act causing injury to persons or property, nor protect the discharger from liability under federal, state or local laws, nor create a vested right for the discharger to continue the waste discharge. 2. These requirements have not been officially reviewed by the United States Environmental Protection Agency and are not issued pursuant to Section 402 of the Clean Water Act. 3. The provisions of this Order are severable, and if any provision of this Order, or the application of any provision of tiiis Order to any circumstance, is held invalid, the application of such provision to other circumstances, and the remainder of this Order, shall not be aftiected thereby. 4. The adoption of these waste discharge requirements constitutes certification of water quality certification for the project as described in this Order pursuant to Section 401 of tiie Clean Water Act. This Order becomes effective on the date of adoption by the Regional Board /, John H. Robertus, Executive Officer, do hereby certify the foregoing is a full. true, and correct copy ofan Order adopted by the Califomia Regional Water Quality Control Board. San Diego Region, on February 13. 2002. rOHNH. ROBERTUS Executive Officer 10 CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD SAN DIEGO REGION MONITORING AND REPORTING PROGRAM NO. R9-2002-0014 FOR CALAVERA HILLS II, LLC AND CITY OF CARLSBAD CALAVERA HILLS MASTER PLAN PHASE II & BRIDGE AND THOROUGHFARE DISTRICT NO. 4 & DETENTION BASINS SANDIEGO COUNTY 1. Constmction monitoring reports shall be submitted quarterly during all grading activities associated with the proposed project. Constmction monitoring reports shall include, but not be limited to the foUowing: a. Names, qualifications, and affiliations of the persons contributing to the report; b. Summary of constmction activities that include general locations, project component (e.g., school site, mitigation site), approximate acreage; c. Quantification of impacts to waters of the U.S. authorized under this Order; d. Dates, times, and names of qualified biologist(s) onsite; e. Summary of any problems, resolution, and notification that occurred during this monitoring period; and f. Photodocumentation, if necessary, of constmction activities. 2. Mitigation monitoring shall occur, at a minimiun, quarterly during the first year following instdlation of mitigation areas, semi-annually during the second and third years, and annually until mitigation has been determined to be successful (as defined in the provisions of this Order, and mitigation success has been agreed to in writing by the Regional Board and tiie U.S. Army Corps of Engineers. Monitoring shall begin immediately after the completion of the first planting period. 3. Mitigation monitoring reports shall be submitted quarterly during the first year following installation, semi-annually during the second and tiiird years, and annually until mitigation has been deemed successful. Monitoring reports shall be submitted no later than 30 days following the end of the monitoring period. Monitoring reports shall include, but not be limited to, the following: a. Names, qualifications, and affiliations of the persons contributing to the report; b. Tables presenting the raw data collected in tiie field as well as analyses of the physical and biological data; Order R9-2002-0014 c. Qualitative and quantitative comparisons of current mitigation conditions with pre-constmction conditions and previous mitigation monitoring results; d. Photodocumentation from estabUshed reference points; and e. Other items specified in the draft and final Wetiand and Riparian Mitigation and Monitoring Plan. Monitoring Reports shall be submitted to: Califomia Regional Water Quality Conti-ol Board San Diego Region 9174 Sky Park Court, Suite 100 SanDiego, Ca 92123 Ordered by:. H.ROBI tecutive Officer A clean environment is innportant to all of us! NOT connected to sanitary sewer systems and treatment plants? The primary purpose of storm drains is to carry rainwater away from developed areas to prevent flooding. Untreated Storm water and the pollutants it carries flow directly into creeks, lagoons and the ocean. In recent years, sources of water pollution like industrial waters from factories have been greatly reduced. However, now the majority of water pollution occurs from things like cars leaking oil, fertilizers from farms and gardens, failing septic tanks, pet waste and residential car washing into the storm drains and into the ocean and waterways. All these sources add up to a pollution problem! But each of us can do our part to help clean up our water and that adds up to a pollution solution! Car washir courtesy of Quality Cons cooperative between tfiel State Depa rti Ecology, Kin( thie cities of i Seattle and City of Car 1635 Farac Carlsbad Storm Wat^ 760-602-2: car washing? How can YOU help keep the environment clean? There's no problem with washing your car. It's just how and where you do it. Most soap contains phosphates and other chemicals that harm fish and water quality. The soap, together with the dirt, metal and oil washed from your car, flows into nearby storm drains which run directly into lakes, rivers or marine waters. The phosphates from the soap can cause excess algae to grow. Algae look bad, smell bad, and harm water quality. As algae decay, the process uses up oxygen in the water that fish need. i I IS" • v" I K Having a clean environment Is of primary importance for our health and economy. Clean waterways provide commercial opportunities, recreation, fish habitat and add beauty to our landscape. YOU can help keep our ocean, creeks and lagoons clean by applying the following tips: • Use soap sparingly. • Use a hose nozzle with a trigger to save water. • Pour your bucket of soapy water down the sink when you're done, not in the street. • Avoid using engine and wheel cleaners or degreasers. • Take your car to a commercial car wash, espec^ if you plan to clean the engine or the bottom of your car. Most car washes reuse wash water several times before sending it to the sewer system for treatment. • Hire only mobile detail operators that will capture wash water and chemicals. It is unlawful for commercial vehicle washing operators to allow wash water to enter the storm drain system. What you should know before using Concrete and Mortar ... In the City of Carlsbad, stornn drains flow directly into local creeks, lagoons and the ocean without treatment. Storm water pollution is a serious problem for our natural environment and for people who live near streams or wetlands. Storm water pollution comes from a variety of sources including oil, fuel, and fluids, from vehicles and heavy equipments, pesticide runoff from landscaping, and from materials such as concrete and mortar from construction activities. The City of Carlsbad is committed to improving water quality and reducing the amount of pollutants that enter our precious waterways. A Clean Environn^^ent is Important to All of Usi City of Carlsbad 1635 Faraday Avenue Carlsbad, CA 92008 Storm Water HOTIine: 760-602-2799 stormwater@ci.carlsbad.ca.us Marrh ?nni Concrete <& Mortar Projects Best Management Practices for Homeowners and Contractors City of Carlsbad Storm Water Protection Program Storm Water HOTIine 760-602-2799 nly Rain in the Storm Drain! Pollution Prevention is up to YOU! Did you know that storm drains are NOT connected to sanitary sewer systems or treatment plants? The primary purpose of storm drains is to carry rainwater away from developed areas to prevent flooding. Untreated pollutants such as concrete and mortar flow directly into creeks, lagoons and the ocean and are toxic to fish, wildlife, and the aquatic environment. Disposing ofthese materials into storm drains causes serious ecological problems—and is PROHIBITED by law. Do the Job Right! This brochure was designed for do-it- yourself remodelers, homeowners, masons and bricklayers, contractors, and anyone else who uses concrete or mortar to complete a construction project. Keep storm water protection in mind whenever you or people you hire work on your house or property. STORM WATER HOTLINE •^60-602-2799 Best Management Practices Best Management Practices or BMPs are procedures and practices that help to prevent pollutants such as chemicals, concrete, mortar, pesticides, waste, paint, and other hazardous materials from entering our storm drains. All these sources add up to a pollution problem. But each of us can do our part to keep storm water clean. These efforts add up to a pollution solution! What YOU Can Do: • Set up and operate small mixers on tarps or heavy plastic drop cloths. • Don't mix up more fresh concrete or mortar than you will need for a project. • Protect applications of fresh concrete and mortar from rainfall and runoff until the material has dried. • Always store both dry and wet materials under cover, protected from rainfall and runoff and away from storm drains or waterways. • Protect dry materials from wind. Secure bags of concrete mix and mortar after they are open. Don't allow dry products to blow into driveways, sidewalks, streets, gutters, or storm drains. • Keep all const^^on debris away from tho ctroot oiittor anrl ctr»rm Hrainc Never dispose of washout into the street, storm drains, landscape drains, drainage ditches, or streams. Empty mixing containers and wash out chutes onto dirt areas that do not flow to streets, drains or waterways, or allow material to dry and dispose of properly Never wash excess material from bricklaying, patio, driveway or sidewal construction into a street or storm draii Sweep up and dispose of small amoun of excess dry concrete, grout, and mortar in the trash. Wash concrete or brick areas only when the wash water can flow onto a dirt area without further runoff or drai onto a surface which has been bermed so that the water and solids can be pumped off or vacuumed up for prope disposal. Do not place fill material, soil or compost piles on the sidewalk or stree If you or your contractor keep a dumpster at your site, be sure it is securely covered with a lid or tarp when not in use. During cleanup, check the street and gutters for sediment, refuse, or debris. Look around the corner or down the street and clean up any materials that may have already traveled away from your property. A ciean environment is important to all of us! Did you know that storm drains are NOT connected to sanitary sewer systems and treatment plants? The primary purpose of storm drains is to carry rainwater away from developed areas to prevent flooding. Untreated storm water and the pollutants it carries, flow directly into creeks, lagoons and the ocean. In recent years, sources of water pollution like industrial waters from factories have been greatly reduced. However now, the majority of water pollution occurs from things like cars leaking oil, fertilizers from farms and gardens, failing septic tanks, pet waste and residential car washing into the storm drains and into the ocean and waterways. All these sources add up to a pollution problem! But each of us can do small things to help clean up our water and that adds up to a pollution solution! What's the problem with fertilizers and pesticides? Fertilizer isn't a problem—IF it's used carefully. If you use too much fertilizer or apply it at the wrong time, it can easily wash off your lawn or garden into storm drains and then flow untreated into lakes or streams. Just like in your garden, fertilizer in lagoons and streams makes plants grow. In water bodies, extra fertilizer can mean extra algae and aquatic plant growth. Too much algae harms water quality and makes boating, fishing and swimming unpleasant. As algae decay, they use up oxygen in the water that fish and other wildlife need. Fertilizer photo Is used courtesy of the Water Quality Consortium, a cooperative venture between the Washington State Department of Ecology, King County and the cities of Bellevue, Seattle and Tacoma. "'"^^Proteo*'''^ Storm Water HOTIine: 760-602-2799 stormwater@ci.carlsbad.ca.us City of Carlsbad 1635 Faraday Avenue Carlsbad CA 92008 www.ci.carlsbad.ca.us How can YOU help keep the environment clean? Having a clean environment is of primary importance for our health and economy. Clean waterways provide commercial opportunities, recreation, fish habitat and add beauty to our landscape. YOU can help keep our creeks, lagoons and ocean clean by applying the following tips: • Don't blow or rake leaves and other yard waste into the street or gutter. • Recycle yard waste or start your own compost pile. • Don't over irrigate. Use drip irrigation, soaker hoses or micro- spray system and water early in the morning. • If you have a spray head sprinkler system, consider adjusting your watering method to a cycle and soak. Instead of watering for 15 minutes straight, break up the session into 5 minute intervals allowing water to soak in before the next application. 4 Keep irrigation systems well- maintained and water only when needed to save money and prevent over-watering. Use fertilizers and pesticides sparingly. Have your soil tested to determine the nutrients needed to maintain a healthy lawn. Consider using organic fertilizers— they release nutrients more slowly. Leave mulched grass clippings on the lawn to act as a natural fertilizer. • Use pesticides only when absolutely necessary. Use the least toxic product intended to target a specific pest, such as insecticidal soaps, boric acid, etc. Always read the label and use only as directed. • Use predatory insects to control hamiful pests when possible. • Properly dispose of unwanted pesticides and fertilizers at Household Hazardous Waste collection facilities. For more information on landscape irrigation, please call 760-438-2722. Master Gardeners San Diego County has a Master Gardener program through the University of Califomia Cooperative Extension. Master A clean environment is important to all of us! Did you know that stomi drains are NOT connected to sanitary sewer systems and treatment plants? The primary purpose of storm drains is to can7 rainwater away from developed areas to prevent flooding. Untreated storm water and the pollutants it cames, flow directly into creeks, lagoons and the ocean. In recent years, sources of water pollution like industrial waters from factories have been greatly reduced. However now, the majority of water pollution occurs from things like cars leaking oil, fertilizers from famis, lawns and gardens, failing septic tanks, pet waste and residential car washing into the stomi drains and into the ocean and waterways. All these sources add up to a pollution problem! But each of us can do small things to help clean up our water and that adds up to a pollution solution! Motor oil ptioto is used courtesy of the Water Quality Consortium, a cooperative venture between the Washington State Department of Ecology, King County and the cities of Bellevue, Seattle and Tacoma. Only Rain in the Storm Drain! City of Carlsbad Storm Water Protection Program City of Carlsbad 1635 Faraday Avenue Carlsbad CA 92008 Storm Water HOTIine: 760-602-2799 4 R E C Y C 1. t USED Oil. Funded by a grant from the California Integrated Waste Management Board Motor Oil J^agy Rain in the Storm Drain! City of Carlsbad Storm Water Protection Program Storm Water HOTIine: 760-602-2799 What's the problem with motor oil? How can YOU help keep our environment clean? Oil does not dissolve in water. It lasts a long time and sticks to everything from beach sand to bird feathers. Oil and other petroleum products are toxic to people, wildlife and plants. One pint of oil can make a slick larger than a football field. Oil that leaks from our cars onto roads and driveways is washed into storm drains, and then usually flows directly to a creek or lagoon and finally to the ocean. Used motor oil is the largest single source of oil pollution in our ocean, creeks and lagoons. Americans spill 180 million gallons of used oil each year into our waters. This is 16 times the amount spilled by the Exxon Valdez in Alaska. Having a clean environment is of primary importance for our health and economy. Clean waterways provide commercial opportunities, recreation, fish habitat and add beauty to our landscape. YOU can help keep our ocean, creeks and lagoons clean by applying the following tips: • Stop drips. Check for oil leaks regularly and fix them promptly. Keep your car tuned to reduce oil use. • Use ground cloths or drip pans beneath your vehicle if you have leaks or are doing engine work. • Clean up spills immediately. Collect all used oil in containers with tight fitting lids. Do not mix different engine fluids. • When yoi^pnge your oil. dispose of it properly. Never dispose of oil or other engine fluids down the storm drain, on the ground or into a ditch. • Recycle used motor oil. There are several locations in Carlsbad that accept used motor oil. For hours and locations, call 760434-2980. • Buy recycled ("refined") motor oil to use in your car. A clean environment is important to all of us! Did you know that storm drains are NOT connected to sanitary sewer systems and treatment plants? The primary purpose of storm drains is to carry rainwater away from developed areas to prevent fiooding. Untreated storm water and the pollutants it Games, flow directly into creeks, lagoons and the ocean. In recent years, sources of water pollution like industrial waters from factories have been greatly reduced. However now, the majority of water pollution occurs from things like cars leaking oil, fertilizers from famis and gardens, failing septic tanks, pet waste and residential car washing into the stonn drains and into the ocean and waterways. All these sources add up to a pollution problem! But each of us can do small things to help clean up our water and that adds up to a pollution solution! Pet waste photo is used courtesy of the Water Quality Consortium, a cooperative venture between the Washington State Department of Ecology, King County and the cities of Bellevue, Seattle and Tacoma. Pec ^'•Protec'i''' Storm Water HOTIine: 760-602-2799 stormwater@ci .carlsbad .ca. us City of Carlsbad 1635 Faraday Avenue Carlsbad CA 92008 vwvw.ci.carlsbad.ca.us City of Carlsbad Storm Water Protection Program Storm Water HG^Tline: 760-60^r27«9 ^Printed on recycled paper What's the problem with pet waste? How can YOU help keep the environment clean? Pet waste is a health risk to pets and people, especially children. It's a nuisance in our neighborhoods. Pet waste is full of bacteria that can make people sick. This bacteria gets washed into the storm drain and ends up in our creeks, lagoons and ocean. The bacteria ends up in shellfish living in these water bodies. People who eat those shellfish may get very sick. Preliminary studies show that dog and cat waste can contribute up to 25% of the hannful bacteria found in our local lagoons. Be responsible and clean up after your pets. It's as easy as 1-2-3! 1. Bring a bag. 2. Clean it up. 3. Dispose of waste properiy in toilet or Having a clean environment is of primary importance for our health and economy. Clean waterways provide commercial opportunities, recreafion, fish habitat and add beauty to our landscape. YOU can help keep our creeks, lagoons and ocean clean by applying the following tips: • Cany a plastic bag when walking pets and be sure to pick up after them. • Clean up pet waste in your yard frequently. • Pick up after your pets before cleaning patios, driveways and other hard surfaced areas. Never hose pet waste into tiie street or gutter. The best way to dispose of pet waste is to flush it down the toilet because it gets treated by a sewage treatment plant. Other disposal methods for pet waste include sealing it in a bag and placing in trash or burying small quantities in your yard to decompose. Be sure to keep it away from vegetable gardens. A Clean Environment is Inf)portant to All of Us! In the City of Carlsbad, storm drains flow directly into local creeks, lagoons and the ocean without treatment. Storm water pollution is a serious problem for our natural environment and for people who live near streams or wetlands. Storm water pollution comes from a variety of sources including oil, fuel, and fluids, from vehicles and heavy equipment, pesticide runoff from landscaping, and from materials such as concrete, mortar and soil from construction activities. The City of Carlsbad is committed to improving water quality and reducing the amount of pollutants that enter our precious waterways. '^^Protec^^"^ Best Management Practices for Swimming Pools, Fountains <& Spas storm Water Protection Program stormwater@ci.carlsbad.ca.us 760-602-2799 City of Carlsbad 1635 Faraday Avenue Carlsbad. CA 92008 City of Carlsbad Storm Water Protection Prograi 760-602-2799 ^ ^Printed on recycled pap Only Rain in the Storm Drain! It's All Just Water, Isn't It? Although we enjoy the fun and relaxing times in them, the water used in swimming pools and spas can cause problems for our creeks, lagoons and the ocean if not disposed of properly. When you drain your swimming pool, fountain or spa to the street, the high concentrations of chlorine and other chemicals found in the water flows directly to our storm drains. Did you know that these storm drains are NOT connected to sanitary sewer systems and treatment plants? The primary purpose of storm drains is to carry rainwater away from developed areas to prevent flooding. Improperly disposing of swimming pool and spa water into storm drains may bc harmful to the environment. Best Managenient Practices Best Management Practices or BMPs are procedures that help to prevent pollutants like chlorine and sediment from entering our storm drains. Each of us can do our part to keep storm water clean. Using BMPs adds up to a pollution solution! How Do I Get Rid of Chlorine? Pool Filters Pool and spa water may be discharged to the storm drain if it has been properly dechlorinated and doesn't contain other chemicals. The good news is that chlorine naturally dissipates over time. Monitor and test for chlorine levels in the pool over a period of 3 to 5 days. Drain the water before algae starts to grow. Consider hiring a professional pool service company to clean your pool, fountain, or spa and make sure they dispose of the water and solids properly. For more information about discharging wastewater to the sanitary sewer, please contact the Encina Wastewater Authority at (760) 438- 3941. Before you discharge your swimming pool or spa water to the storm drain, thc water: • Must not contain chlorine, hydrogen peroxide, acid, or any other chemicals. • Can not carry debris or vegetation. • Should have an acceptable pH of 7-8. • Can not contain algae or harmful bacteria (no "green" presaof). • Flow must be cdBolled so that it does Clean filters over a lawn or other landscaped area where the discharge can be absorbed. Collect materials on filter cloth and dispose ir the trash. Diatomaceous earth cannot be discharged into the street or storm drain systems. Dry it out as much as possible, bag il in plastic and dispose into the trash. Acid Washing Acid cleaning wash water is NOT allowed in thc storm drains. Make sure acid washing is done in a proper and safe manner that is not harmful to people or the environment. It may discharged into the sanitary sewer through a legal sewer connection after thc pH has been adjusted to no lower than 5.5 and no higher than 11. Do the Job Right! • Use the water for Irrigation. Try draining dc-chlorinatcd pool water gradually onto a landscaped area. Water discharged to landscape must not cross property lines ar must not produce runoff. • Do not use copper-based algaecides. Control algae with chlorine or other alternatives to coppcr-bascd pool chcmico Copper is harmful to the aquatic environment. • During pool construction, contain ALL materials and dispose of properly. Materials such as cemcn^^nitc, mortar, and sediment must not bWBcharged into Only Rain In thc Storm Drain! Storm Water Protection... It's OUR Business! Did Vou Know... The primary purpose of storm drains is to carry rain water away from developed areas to prevent flooding. Storm drains are not connected to sanitary sewer systems and treatment plants. Untreated storm water and the pollutants it carries flow directly to creeks, lagoons and the ocean. Storm water pollution comes from a variety of sources including: • Oil, fuel and fluids from vehicles and heavy equipment • Lawn clippings, pesticide and fertilizer runoff from landscaping • Sediment and concrete from construction and landscaping activities • Bacteria from human and animal waste • Litter The City of Carlsbad is committed to improving water quality and reducing the amount of pollutants that enter our precious waterways. Why do v^^eed a clean environment? H;»vinn a ripan pnvirnnmpnt i<; nf nrimarv Imnnrtanrp fnr EVERYONE is responsible for protecting storm water! Storm Water pollution prevention is a shared duty between the City of Carlsbad and the Community. Storm drains on public property are monitored and cleaned by the City. Everyone has a part to play in keeping our storm drains free of pollutants. Methods used to prevent storm water pollution are called Best Management Practices (BMPs). Heip keep our creeks, lagoons and ocean clean! Below are some BMPs you can use at home. Sweep or Rake • Sweep up debris and put it in a trash can. Do not use a hose to wash off sidewalks, parking areas and garages. Rake up yard waste and start a compost pile. Reduce Use of Landscape Chemicals • Minimize the use of lawn and garden care products such as pesticides, insecticides, weed killers,fertilizers, herbicides and other chemicals. Avoid over-irrigation which washes chemicals into the gutter and storm drains. Use Soap Sparingly • When washing your car at home, use soap sparingly, divert washwater to landscaped areas and pour your bucket of soapy water down the sink. Never wash your car in the s| What is the Storm Water Program? The City is regulated by a municipal storm water permit that was issued by the State Water Resources Control Board. The City's Storm Water Program helps to ensure compliance with the permit by: • Inspecting Carlsbad businesses and requiring BMPs to prevent pollution • Investigating and eliminating illegal discharges to the storm water system • Overseeing and conducting water quality monitoring programs • Educating the public about ways to prevent storm water pollution Are all discharges to the storm drain illegal? In the strictest definition, only rain water can legally enter the storm cL^n. However, the permit currently allows some typ^^discharges into storm drains when BMPs arp USPH tn rpdurp nollurant«;. Snmp pxamnlp<; inrliidp! How do I report a storm water violation? The Storm Water Program operates a hotline and an e-mail address to receive referrals about storm water pollution and illegal discharges and to answer questions about storm water pollution prevention. If you see someone dumping or washing waste or pollutants to the street or storm drain, please call the hotline at 602- 2799 or send an email to stormwater@ci.carlsbad.ca.us. This information is entered into the City's Request for Action system and is routed to the appropriate person for response. Where can I get more information? • Visit the City's website at www.ci.carlsbacl.ca.us/ cserv/storm.html to view brochures, documents or link to other water quality websites. • Call the hotline at 602-2799 to have information sent to you. • To view a copy ofthe Permit, please go to http://www.swrcb.ca.gov/programs/ sd _ stormwater.html. What is the City doing to keep our waterways clean? Significant efforts are being made by City departments to help keep our waterways clean. A few program activities are listed below: • Educating the public and City employees about storm water pollution prevention through our website, brochures, publications, workshops and public events • Inspecting construction sites to ensure that developers are implementing Best Management Practices • Implementing Best Management Practices at City facilities • Conducting industrial and commercial inspections to ensure businesses are aware of and complying with the storm water program requirements • AddressinJ^rm water requirements for new rlo\#olr>r>mont anrl cinr>ifirant rorio\io\r\r\mont Only Rain in the Storm Drain! storm Water Protection... It's OUR Business! Did Vou Know... The primary purpose of storm drains is to carry rain water away from developed areas to prevent flooding. Storm drains are not connected to sanitary sewer systems and treatment plants. Untreated storm water and the pollutants it carries flow directly to creeks, lagoons and the ocean. Storm water pollution comes from a variety of sources including: • Oil, fuel and fluids from vehicles and heavy equipment • Lawn clippings, pesticide and fertilizer runoff from landscaping • Sediment and concrete from construction and landscaping activities • Bacteria from human and animal waste • Litter The City of Carlsbad is committed to improving water quality and reducing the amount of pollutants that enter our precious waterways. Why do we need a clean environment? Having a clean environment is of primary importance for our health and economy. Clean watenvays provide commercial opportunities, recreation, fish habitat and add beauty to our landscape. All of us benefit from clean water-and all of us have a role in making and keeping our creeks, lagoons and ocean clean. EVERYONE is responsible for protecting storm water! Storm Water pollution prevention is a shared duty betwee the City of Carlsbad and the Community. Storm drains on public property are monitored and cleaned by the City. Everyone has a part to play in keeping our storm drains fre of pollutants. Methods used to prevent storm water polluti are called Best Management Practices (BMPs). Help keep our creeks, lagoons and ocean clean! Below are some BMPs you can use at home. Sweep or Rake • Sweep up debris and put it in a trash can. Do not use a hose to wash off sidewalks, parking areas and garages. Rake up yard waste and start a compost pile. Reduce Use of Landscape Chemicals • Minimize the use of lawn and garden care products such as pesticides, insecticides, weed killers,fertilizers, herbicides and other chemicals. Avoid over-irrigation which washes chemicals into the gutter and storm drair Use Soap Sparingly • When washing your car at home, use soap sparingly, divert washwater to landscaped areas and pour your bucket of soapy water down the sink. Never wash your car in the street. Clean up After Your Pets • Take a bag when you walk your pets and be sure to always clean up after them. Flush pet waste down the toilet or dispose of it in a sealed plastic bag and throw it in the trash. Buy Non-Toxic Products • When possible, use non-toxic products for household cleaning. If you must use a toxic cleaning product, bu, small quantities, use it sparingly and properly dispose ol unused portions. For the Household Hazardous Waste collection facility nearest you, call 1 -800-CLEANUR hat is the Storm Water Program? e City is regulated by a municipal storm water permit that was issued by the State Water Resources Controi Board. The City's Storm Water Program helps to ensure compliance with the permit by: • Inspecting Carlsbad businesses and requiring BMPs to prevent pollution • Investigating and eliminating illegal discharges to the storm water system • Overseeing and conducting water quality monitoring programs • Educating the public about ways to prevent storm water pollution Are all discharges to the storm drain illegal? In the strictest definition, only rain water can legally enter the storm drain. However, the permit currently allows some types of discharges into storm drains when BMPs are used to reduce pollutants. Some examples include: Landscape irrigation and lawn watering runoff Dechlorinated pool water Residential car washing Potable water sources Foundation drains Water line flushing How do I report a storm water violation? The Storm Water Program operates a hotline and an e-ma address to receive referrals about storm water pollutio? illegal discharges and to answer questions about storm w. pollution prevention. Ifyou see someone dumping or washing waste or pollutai to the street or storm drain, please call the hotline at 602- 2799 or send an email to stormwater@ci.carlsbad.ca.us. This information is entered into the City's Request for Acti system and is routed to the appropriate person for respon Where can i get more information? • Visit the City's website at www.ci.carlsbad.ca.us/ cserv/storm.html to view brochures, documents or linl to other water quality websites. • Call the hotline at 602-2799 to have information sent to you. • To view a copy ofthe Permit, please go to http://www.swrcb.ca.gov/programs/ sd_stormwater.html. What is the City doing to keep our waterways clea Significant efforts are being made by City departments '"^ help keep our watenvays clean. A few program activitiv are listed below: • Educating the public and City employees about storm water pollution prevention through our website, brochures, publications, workshops and public events • Inspecting construction sites to ensure that developers implementing Best Management Practices • implementing Best Management Practices at City facilil • Conducting industrial and commercial inspections to ensure businesses are aware of and complying with the storm water program requirements • Addressing storm water requirements for new development and significant redevelopment • Conducting water quality monitoring in the storm drait system and in our creeks, lagoons and ocean • Investigating reports of illegal discharges • Implementing a Watershed Urban Runoff Managemenl Plan (WURMP) with the County and other North County cities to protect all of our waterways Be Part of the Pollution Solution!