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Home My WebLink AboutCT 05-13; LA COSTA RIDGE NEIGHBORHOOD 2.6; LETTER OF MAP REVISION BASED ON FILL; 2010-01-11HUN SAKE R &ASSOClATES __ -....::I 5 AND lEG 0, INC. PLANNING ENGINEERING SURVEYING IRVINE LOS ANGELES RIVERSIDE SAN DIEGO ARIZONA LETTER OF MAP REVISION BASED ON FILL (LOMR-F) for LA COSTA RIDGE 2.6 G-C o5--~3 City of Carlsbad, California Prepared for: D.R.Horton 1021 Costa Pacifica Way Suite 2107 Oceanside, CA 92054 W.O. 1375-199 January 11, 2010 Hunsaker & Associates San Diego, Inc. DAVE HAMMAR LEXWILLIMAN ~ ALiSA VIALPANDO I :c~ y DAN SMITH ~ ~~~LL~~~~~~ ________ _ RAYMARTINR ond L. Martin, R.C.E. CHUCK CATER Vice President 9707 Waples Street San Diego, CA 92121 (858) 558-4500 PH (858) 558-1414 FX www.HunsakerSD.com Info@HunsakerSD.com DE:kc h \reports\17S1\136\1omr\lomc01 doc W 0 1751-136 2/5/201011:29 AM r .' ',- I I I I I I J i U.S. DEPARTMENT OF HOMELAND SECURiTY -FEDERAL EMERGENCY MANAGEMENT AGENCY COMMUNITY ACKNOWLEDGMENT FORM O.M.B: 1'1'0.1660-0015 Ji."I:pires December 3~ .• 20/0 PAPERWORK BURDEN DISCLOSURE NOTICE Public reporting burden for this form is estimated to average 1.38 hours per response. The burden estimate includes the ,time for reviewing instructions, searching existing data sources, gathering and maintaining the needed 'data, and completing, ~evrewing, and submitting the form. You are'not required. to respond to this collection of information unless a valid OMS control number appears in the upper right comer of this form. Send comments regarding' the acc:urac y of the bur den esti mate and a ny suggestions for reducing f!1is bur den to: Info rmation Collections Management, O.S. Department of ' Homeland Security, Fe'deral Emergency Management Agency, 500 CSt reet, SW, Washington DC 20472, Paperwork Reductfon Project (1660-9015). Submission ofthe forln is required to obtain or retain benefits und er the National Flood Insura nce Progra m. Please ~o not send your completed survey to the above address. . This form must be completed for requests involvi ng the existing or proposed place ment offill (complete Section A) 0 R to provide acknowledgment of this request to, remove_a property from the SFHA which was previously located within the regulatory floodway (complete' Sectioll )3). This form must be completed a nd signed by th e official responsible for floodplain management in the community. .The six digit NFIP community number and the subject property address must,appear in the spaces provided below. Incomplete submissions may result in. processing delays. Community Number: Property Name or Address: A. REQUESTS INVOLVING THE PLACEMENT OF FILL As tile comniu.n}ty official responsible for floodplain management, I hereby acknowledge thatwe have received and· reviewed this Letter of Map -Revision Based on Fill (LOMR-F) or Conditional LOMR-F request. Based upon the community's review, we find the completed or proposed project meets or is designed to meet all of the community floodplain management reqUirements, including the requirement that no fill be placed in the regulatory floodway, and that all necessary Federal, State, and local permits have been, or in the case of a Conditional LOMR-F, will be obtained. In addition, we, have ' determined that the land and any existing or proposed structures to be removed from the SFHA are or will be reasonab'ly safe from flooding as defined in 44CFR 65.2(c), and that we have available upon request by DHS-FEMA, all analyses and documentation used to 'make this determination. For LOMR-F requests, we understand that this request is being forwarded to DHS-FEMA for a possible map revision. For LOMR-F or Conditional LOMR-F requests . that have the potential to impact an endanger~d species, documentation will be submitted to show that we have complied with Sections 9 and 1.0 of the Endangered Species Act (ESA). Section 9 ofthe ESA prohibits anyone from "taking" or harming an endangered species. Ifan action might harm an endangered species, a permit is required from U.S. Fish and Wildlife Service or National Marine Fisheries Service under S_ection 10 of the E;SA. For. actions authorized, funded, or being carried out by Federal or State agencies, documentation from the agency showing its compl.iC!nce with Section 7(a)(2) of the ESA will be s[lbmitted.· ' Community Comments: Commur]!y Official's "Name and Title: (Please Print or Type) F-Cd$~\"' I. :.J"ol-fI-!'jDiV ..TA, ~ ITY c'Z/v6.ilVf-:.6'"£.. ~( Tele~,one No.: .. lib~, (.CiL-2. 1.,4 - Date. " , ~(.14Ito I ·N. B, PROPERTY LOCATED WITHIN THE REGULATORY FLOODWAY \J \J . As the community official responsible for floodplain management, I hereby acknowledge that we have received E!nd rev.iewed this request for a LOMA. We understand that this request is being forwarded to DHS-FEMA to determine if this property has been inadvertently included in the regulatory f1oodway. We acknowledge that no fill on this property has been or will be placed within the desig'nated regulatory f1oodway. We find that the completed or proposed project meets or is designed to meet all of the community floodplain management reqUirements. Community Comments: Community Official's Name and Title: (Please Print or Type) Telephone No.: Community Name: Community Official's Signature (required): Date: ' ..... DHS -FEMA Fonm 81-87B, DEC 07 Community Acknowledgment Form MT-1 Form 3 Page 17 of 1 " .. . -,~.~ , '. .' " La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 1 -EXECUTIVE SUMMARY 1.1 -Introduction The La Costa Ridge Neighborhood 2.6 project site is located west of Rancho Santa Fe Road at the intersection of Corintia Street and Melrose Drive intersection within the City of Carlsbad, California (see Vicinity Map on this page). San Marcos Creek ·is adjacent and to the south of the project site. VICINITY MAP /iTS AIASm1 mfl/ml£ AlAPBCXI/Ii!ARY /iTS. All runoff from the project site will drain to the adjacent San Marcos Creek Runoff from the San Marcos Creek eventually discharges into the 8atisquitos Lagoon. This Letter of Map Revision has been prepared per the request of the City of Carlsbad, as the La Costa 2.6 qevelopment is adjacent to the previously delineated FEMA floodplain (per FIRM Map No. 06037C1051 F). . This portion of San Marcos Creek has a floodplain designation of Zone A. hence no previous detailed analysis exists. Per a previous Army Corps study a peak flow conveyance of approximately 13,000 cfs was identified for the San Marcos Creek at this location. DE:r h:\r6ports\17511136~oinrJomr_Dl.doc w.o.1751·136 2116/20105:13 PM ·1 I .1 I I I I. ,I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill TABLE OF CONTENTS Chapter 1 -Executive Summary 1.1 Introduction 1.2 Summary of Pre-Development Conditions 1.3 Summary of Developed Conditions 1.4 Summary of Results 1.5 References 1.6 FEMA MT-1 Form Chapter 2 -Floodplain Analysis Methodology (HEC-RAS) 2.1 Model Selection 2.2 Cross Section Data 2.2.1 Cross Section Locations 2.3 HEC-RAS Model Design Input Parameters 2.3.1 Starting Water Surface Elevations 2.3.2 . Manning's Roughness Coefficients Chapter 3 -Pre-Developed Condition HEC-RAS Results 3.1 Pre-Developed Summary Table 3.1.1 Channel Cross Sections 3.1.2 Channel Profiles 3.1.3 Pre-Developed Condition HEC-RAS Report Chapter 4 -Developed Condition HEC-RAS Results 4.1 Developed Summary Table 4.1.1 Channel Cross Sections 4.1.2 Channel Profiles 4.1.3 Developed Condition HEC-RAS Report Chapter 5 -Pre-Developed Condition Floodplain Exhibit Chapter 6 -Developed Condition Floodplain Exhibit APPENDIX A -As Built Plans for La Costa 2.6 SEC"nON II III IV V VI DE:de h:lreporlsI17511136Uomrllom,_01.doc w.o.1751-136 9/101200910;06 AM -,I ,I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill List of Tables and Figures Chapter 1 -Vicinity Map Chapter 1 -FIRM 06037C1051 F Chapter 1 -Pre-Developed San Marcos Creek HEC-RAS Water Surface Elevations Chapter 1 -Pre-Developed Conditions Floodplain Exhibit Chapter 1 -Post-Developed San Marcos Creek HEC-RAS Water Surface Elevations Chapter 1 -Developed Conditions Floodplain Exhibit Chapter 1 -Pre vs. Post-Developed San Marcos Creek HEC-RAS Water Surface Elevations DE:do h:\roportsl17511136l1omrllomr_Ol.doc w.o.1751·136 9/101200910:06'AM ,I I -I .1 I I I I I I I I 11 I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CH,APTEf~ -I -EXECUTiVE SUNlMARY 1:1 -Introduction The La Costa Ridge Neighborhood 2.6 project sIte is rocated west of Rancho Santa Fe Road at the intersection or Corintia Street and Melrose Drive intersection within the City o'f Carlsbad, California (see Vicinity Map on this page). San Marcos Creek is adjacent and ·to the south of the project site. VICINITY MAP N7S NTS AI! runoff from the project site will drain to the adjacent San Marcos Creek. Runoff from the San Marcos Creek eventually discharges into the Batisquitos Lagoon. This Conditional letter of Map Revision has been prepared per the request of the City of Carlsbad. This Conditional Letter of Map Revision was prepared as the La Costa 2.6 developmen~ is adjacent to the previously delineated FEMA floodplain (per fiRM Map No. 06037C1051 F). This portion of San MaiCOS Creek has a floodplain deSignation of Zone A, hence no previolls detailed analysis exists. Per a previous Army Corps study a peak flow conveyance of approximately 13,000 ds was identi'fied for the San Marcos Creek at this location. DE:de h:\reports\1751\136~omr\lomr_01.doc w.o.1751-136 9110/200910:06 AM POOR QUALITY ORIGINAL S LA COSTA RIDGE NEIGHBORHOOD 2.6 CITY OF CARLSBAD. CAUFORNIA R,\04S9\SoHycf'\D4S9SH10-EX-FIRH.dwg[ 208S]Ho.r-DS-20n7l1653 1 OF 1 iI-/t, I! I. '" ... o~. ~ . ""r,," 11,,, 13 I. I ,12 I II R'''O 24 """'" 13 I I I 4' I I I 5 I I I 6 I 33005'3T" 1 ........ !1J!il lrr-IS"OCr I ZONE X c D Q 19 NOTE: MAP AJtEA. SHOWN ON.lHlS'PANEllS LOCATED WITHIN TOWNSHIP" 12 SOUTH, RANGE .(. WEST AND TOWNSHIP 12 SOUTH, RANGE 3 WEST, ' CITY OF CARLSBAD 060285 30 31 ZONE X e ZONE X CITY OF SAN 060296 SAN DIEGO COUNTY--l------L UNlNCORPORAT.ED AREAs "'284 32 F ';.;;;---------------------I~ __ ..L _____________ _li 33"05'3'" 1L7-1!!'OlW .--------------._----------------------------------------------------------_. LEGEND -SPEOAl. FLOOO HAZARD AREAS INUNOAlm BY1~)'£AR FLOOO MD'-bc!"",,",-~ _roOClCltlt-..~. %QNfAH ~oC\t.!)~~ 17 XONtAO, l1ood"¥-ri,IOI'hcw-Gr"'-"-'''''~~~~ ~r"" __ IJ!.-..w .... rl<lOCl"" ~.cIatf........t. UlNlAt9 Tot.pr-.:lfr<>ml~r.o..cIb'f fai:nlllocd~"",,,,urdtr --..aIon, ... ,,-~~ c-t;oItood"","~hmrdl-oo 1IdSanI,"'bIool'ol>cd~~ -~ c-Il\ood...tlt>~h&utdI_ "-"'_lIo>odol_~ R.OODWAY AREAS IN ZONE. AE OTHER MOO AREAS 2ON~X "-tl~~_tl~ to.d""" ........ ~"'_"'"" D ''''''''ot'ooiI!>draIo ...... -.''''''' 1oq ...... rnIlo::_ .... ~-irr 1ro«o,....,1tD-fu'~ OTHER AREAS ~~ .. _~l~ "'-In..w. """od hauodo ........... UNDEVELOPED COASTAl. B.\RR1ERS ~ tTI ~ ........ ....... 11&) 1!I9'O ~ ...... CooslaI_I_"'~IDcaIIICI~Df~1D~ FlaadHoald.Atou.. FbocIIku;.4q' -''''''' ZonoOIl¢'~ ~O~;SpodoIFIaod I\qmI z...... ond eou.m'l' o~ "'_ '" Dllfo .. :ftI CI>uIoIa...Ro«I~ 'MIM~Rooc!tv.-d .... eo .. _ a...""" u... --513--a-t.>n" fK'~ 5M Io.Iap hItIr. @-------@ ::-~ 0:; ."'\_~ __ .M=,-~~!'~_ s..M&p_""'a-tcmDo1llm. RM7X E __ RI:I .......... u..rt .'" 1i<>IItctDI~.....,OII~ 91001'30",32<122'30" ,."......"DoIIllllc!1927IIlAOVI -NOTES lli11l1WP.b .... irlodIMlst..trc:l1:ho~fiIIao!"--~ f~I'CI{~ldcrdIyaJ_JUIl/td.tIIll<>OcIi'C.pallic:Wllrlrwn a:oI_~It_dl>NOll_"' .. ~feft.ns_ ~fbodtt.a:...~ ......... e-t.!blUf'.oocI~o;;;>~ortr~otO.lltfG'd) • .:Id1ncWa '''''.tfoc:tlal ....... Ido<I:_~"''''.100d!rl ... ~ tall _ ...........,... trr 1M Hr.icmal ~s.r-h!t_ ---pbMlrv. JnqcfSpc!.o/RoocIH&Wl!~rlODdlind.dooZ-A.~NlNJ, A!S,V,&IId'v'E, eu-.. ItI __ ko &pocoo! Rood IWMIhMl IN!' be pIOIKIM bv I::>od=nltl>llltno ___ ~oIh~_~IIUCKt_IMdIOnSanc:! ~bIIIwnn"""'''''''-'Tho~ __ ''''"'d'''' ~eotWd_WIIII'~"'~"""""" .. cI"'"FedctIII ....... _- ~¥d:I!hIIn~_....,.be""'ran-tllsl-..Ula:M. f!:: .. d .... -rW.t\ho_~irllbIoflocd"""""-'tu<tt1loopofL ,.,.,ma~fI1Iy'~~te~."Cm:Als...r.. II~SyNmu,lIIlnd/""~Pmocted _ MU/:II..:.I ... h~e..r... ___ /laDl'm(l(PI..1aI-691l. Cor!>Int~.mb.IIoowI ... .......nt .. atu-. ~at'ChltIl1lOfl.The_ tIIIIUId __ "",,,~mM:Ia"to_...-ft~ ..... "-~~tr:lu.. .......... "'u.fl'ilp. FGt~INP~IC'.DI'{pt\cfUl~~,_ ~&Jlo'1:hofb>d~S!.udyl\lIPort. Faood'~I'\IPPO"'"-..jbeHmap ....... _~~ .... - MAl'REPOSITORY Rlttert:c Reposl'lDryUstlng ollM!oplnd"" EFFEC'TIVE DATE OF COUNlYMOE FLOOD INSURA.NCC RATE MAP. JUNEUI.t!1S7 efFECTIVE DATEIS)OF REVlSION[SlTO n·ns PANEl: 11.01 ... to "'" FLOOD tNSUlWICE flAtE IMP El'ffCTM o...n ._ ... thkl!'109to~_~_""""tont'~n -...+....~Dt~"-'_.NllI"!t!Mod. To~~t-d~lf,...t:atM._~an __ ~ ... c.II'lMNaw!nalRocdlnl.url_rrc.;..mKt~II:J6-6G2D .. APi"ROXIMATE SCAlE IN FEET o SQO .!!!!!n!!.!!:!:!!!.~ -- MAP NUMBER OS073C1051 F EFFECTIVE DATE: JUNE 19, 1991 I ,I "I .1 I I I I I I I I I I: I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill The la Cos'fa Ridge Neighborhood 2.6 SITe is part of the La Cos'fa Ridge development in ·the Cfty of Carlsbad, California. The site has been mass graded in aotidpatloo 'ior residan'Hal de\le~opmenl per 'the "Grading and Erosion Control Plans for La Costa Ridge Stockpile Plan" daied September, 2004 by Hunsaker & Assoc;ales. Per the" Mass Grading Hydrology Study for the Villages of La Costa Neighborhoods 2.1 through 2.5" dated January, 20004 by Hunsaker & Associates, a 48-inch storm dlfarn ~ocated with~n the adjacent Cor.ntia Street conveys a flow of approximately 154 cfs from the neighboring La Costa Rtdge Neighborhood 2.5. This 48-inch RCP storm drain discharges runoff ~nto the project site, eventually draining overland and discharging to San Marcos Creek. T~ble "' -Slilmmall'Y of Existing Pealk Inflows Draftnage locat~ol!l lDlI'annage All'ea 100-Yeall" Peak F~ow (Ac) (cifsl 48-inch RCP from 68.4 154.0 Neighborhood 2.5 The Regional Water Quamy Control Board has identified San Marcos Creek as part of the Carlsbad Hydrologic Unit, San Marcos Hydrologic Area, and the Batiquitos Subarea (basin number 904.51). Table 2 summarizes the HEC-RAS model results for the calculated water surface elevations for the pre-developed San Marcos Creek at the La Costa 2.6 project site. Ta1Ib~e 2 -PlT'e-lDeveDoped !HIEC-RAS Water Surface Elevations Cross Secil:uolJ1l locatnolll 11 Upstream Limit 10.5 Bridge 10 9 8 Project Boundary 7 6 5 4 3 2 1 Downstream Limit HEC-RAS 100-Year Water Surface Elevation (ft) 338.41 337.02 336.25 335.88 335.08 334.08 333.10 331.92 330.59 328.27 323.71 DE:de h \reports\1751\136~omr~omr_01.doc w.o.17S1-136 9/10f200910:06-AM "I -I :~I 01 I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill A revised pre-developed floodplain exhibit for San Marcos Creek has been provided on the following page. 1.3 -Summary of Developed Conditions Development of the 11.2-acre area consists of 54 single family residences, foot paths, communal open space and underground utmties with two (2) entrances from the adjacent Corintia Street. Runoff generated by the La Costa Ridge Neighborhood 2.6 development is conveyed in a southerly direction via curb and gutter within the proposed site, draining into two (2) curb inlets. Flow from the adjacent Neighborhood 2.5's 48.,inch RCP storm drain is conveyed south by a storm drain system within the Neighborhood 2.6 site. The existing offsite flows converge with flows from the developed Neighborhood 2.6 site, discharging into the receiving San Marcos Creek. Offsite runoff from the adjacent Corintia Street that previously drained to the La Costa Greens 2.6 project site via two (2) existing curb inlets is intercepted via two (2) curb inlets within Corintia Street near the Private Street "G" entranceway. Flows are conveyed via public storm drain through the project site (located within a public easement), confluencing with on site flows prior to discharge from the project site. Per the "TM Drainage Study for La Costa Ridge 2.6" dated May, 2006 by Hunsaker & Associates, peak flow data from the developed site to the receiving San Marcos Creek is summarized in Table 3 below. Tabie 3 -Summary of Post-Deve~oped Conditions Drainage LocatBon Drainage Area 100-Year Peak Flow (Ac) (cis) 48-inch RCP to San 77.1* 174.5 Marcos Creek .-*= mcluslve of Neighborhood 2.5 tnbutary Discharge to the receiving San Marcos Creek was analyzed per the "Preliminary Hydrology for Vii/ages of La Costa -The Ridge and the Oaks" dated April 2001, by Hunsaker & Associates. The project involved grading, elevating all residences above the ultimate condition 100 year floodplain. Grading will be conducted adjacent to the floodplain as delineated on the current FIRM. Table 4 summarizes the HEC-RAS model results for the calculated water surface elevations for the post-developed San Marcos Creek at the La Costa Ridge 2.6 project site. DE:de h:lreports\17S1\136~omr'Jomr_01.doc w,O.17S1-136 9/101200910:06 AM I I I I I I I I I I I I I I I I I I I so ~ ~ so 100 ------ EXISTING FLOODPLAIN FIRM FLOODPLAIN FLOWLINE CROSS SECTION 8 /' NGVO 1929 VERTICAL DATUM USED /// ~E=~ //~~ J ~ ~/~---~~ .r~~_ M ~o '"tij DATUM NOTE! LA COSTA RIDGE NE~GHBORHOOD 2.6 CITY OF CARLSBAD, CAUFORNIA ,. -' SHEET 1 OF 1 Ri\'04S9\~Hyd\'0459!:iH12-EX-HECRAS.d1Jg[ 2DB5JMo.r-DS-2DD7114134 I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill Table 4 -Post-Developed HEC-RAS Water Surface Elevations Computed 100-Adjacent Road Cross Section Location Year Water Surface/Developed Surface EWevc;rlion Pad E~evation (fft) (ft) 11 Upstream Limit 338.41 NA 10.5 Bridge NA 10 337.03 NA 9 336.26 NA 8 Project Boundary 335.89 348.9 7 335.08 348.9 6 334.08 351.0 5 333.10 354.3 4 331.92 355.7 3 330.59 358.6 2 328.27 359.5 1 Downstream Limit 323.71 NA 1.4 -Summary of Resu~ts Hydraulic computations were modeled using the HEC-RAS program for the water- surface profiles of the drainage channels. The 100-year peak flow of 13,000 cfs was used as the base flood for the San Marcos Creek hydraulic model. The HEC-RAS model was used to ascertain water surface elevations, flow velocities and the updated floodplain boundary. Table 5 summarizes the pre versus post-developed HEC-RAS mode! results for the calculated water surface elevations for the San Marcos Creek within the La Costa Ridge 2.6 site. DE:de h:\reports\1751\136\1omr\lomr_01.doc w.o:1751-136 9110/200910:06 AM ~ .~ 60 60 120 ------- PROPOSED FLOODPLAIN EXISTING FLOODPLAIN FLOWLINE CROSS SECTION @) DATUM NOTE: NGVD 1929 VERTICAL DATUM USED LA COSTA RiDGE NEIGHBORHOOD 2c6 CITY OF CARLSBAD, CALIFORNIA ./" SHEET 1 OF 1 R.\0459'&Hyd\0459sHll-DEV-HECRAS.dwg( 2DB5JMa.y-11-2007.12128 I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill Table 5 -Pre vs. Post-Developed HEC-RAS Water Surface Elevations Pre-Developed Post-Developed Cross Computed 100-Computed 100-Difference Location Year Water Year Water Section Surface Surfac-e Elevation (oft) Elevation (ft) (ftc) 11 . Upstream Limit 338.41 338.41 0 10.5 Bridge 0 10 337.02 337.03 + p.Q1 9 336.25 336.26 .oft-0.01 8 Project Boundary 335.88 335.89 + 0.01 7 335.08 335.08 0 6 334.08 334.08 0 5 333.10 333.10 «> 4 331.92 331.92 0 3 330.59 330.59 0 2 328.27 328.27 0 1 Downstream limit 323.71 323.71 0 HEC-RAS model creation methodology is located in Chapter 2 of this report. HEC- RAS cross section data, summary tables and program output files are located in Chapters 3 & 4. Based upon the results of HEC-RAS analysis, the residences within the La Costa Ridge 2.6 development have been elevated several feet above the adjacent floodplain. 1.5 -References "San Diego County Hydrology Manual", County of San Diego Department of Public Works -Flood Control Section; June 2003. "TM Drainage Study for La Costa Ridge 2.6", Hunsaker & Associates, May 2006. "Preliminary Hydrology for Vii/ages of La Costa -The Ridge and the Oaks", Hunsaker & Associates; April 2001. "Mass Grading Hydrology Study for the Vii/ages of La Costa Neighborhoods 2. 1 through 2.5", Hunsaker & Associates; January 2004. DE'de h.'\reports\1751\136\1omr\lomc01.doc w.o.17S1-136 9110/200910.06 AM '" . I I I I I I I I I I I U.S. DEPARTMENT OF HOMELAND SECURITY -FEDERAL EMERGENCY MANAGEMENT AGENCY PROPERTY INFORMATION FORM O.M.B. NO. 1660-0015 Expires December 31 .. 20io PAPERWORK BURDEN DISCLOSURE NOTICE Public reporting burden for this form is estimated to average 1.63 hours per response. The burden estimate includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are not required to respond t6 this collection of information unless a valid OMB control number appears in the upper right corner of this form. Send comments regarding the accurac y of the bur den esti mate and a ny s ugges!ions for r educing this bur den to: Info rma!ion Collections Management, U.S. Department of Homeland Security, Federal Eme rgency Management Agency, 500 G St reet, SW. Washington DC 20472, Paperwork Reduction Project (1660-0015). Submission of the form is required to obtain or retain benefits und er the National Flood Insura nce Progra m. Please do not send your completed survey to the above address. This form ma y be completed by the property owner, property owner's agent, Iicen sed land surveyor, or registered professional engineerto support a request for a Letter of Map Amendment (LOMA), Conditional Letter of Map Amend ment (GLOMA), Letter of Map Revision Based on Fill (LOMR-F), or Conditional Letter of Map Revision Based on Fill (GLOMR-F) for eXisting or proposed, single or multiple lots/structures. In order to process your request, all information 0 n this form must be completed in its entirety. Incomplete submissions may result in processing dela ys. Pleas e check the item bel·ow that describes your request o LOMA o CLOMA 10" LOMR-F o CLOMR-F A letter from DH S-FEMA stating that an existing stru cture or pa rcel of land that has not been elevated by fill (natural grade) would not be inundated by the base flood. . A letter from DHS-FEMA stating that a proposed struct ure that is not to be elevat ed by fill· (natural grade) would not be inundated by the base flood if built as proposed. A letter from DH S-FEMA stating that an existing structure or pa rcel ofland that has been elevated by fill would not be inundated by the base flood. A letter from DHS-FEMA stating that a parcel of land or proposed structure that will be elevated by fill would not be inundated by the base flood if fill is placed on the parcel as proposed or the structur e is built as proposed. Fill is defined as material from an y source (including the subject property) placed that raises the ground to or abo ve the Base Flo od Elevation (BFE). The common construction practice of removi ng unsuitable existing material (topsoil) and backfilling with select structural mate rial isn ot considered th e placement of fill if the practice does not alter the eXisting (natural grade) elevation, which is at or ab ove the BFE. Fill that is placed before the date of the first National Flood Insurance Program (NFIP) map showing the area in a Special Flood Hazard Area (SFHA) is·considered' natural grade. Has fill been placed on your property to raise ground that was previously below the BFE? Will fill be placed on your property to raise ground that is below the BFE? o Yes ~o If yes, when was fill placed? ~Yes 0 No If yes, when will fill be placed? month/year /1 I ~()O1 I month/year I 1. Street Address of the Property (if request is for multiple structures, please attach additional sheet): Nt A I I I I I I I 2. Legal description of Property (Lot, Block, Subdivision)(complete description as it appears in the Deed is not necessary): .Af> N 'l-2,.'S -'72..0 -c;:, ~ 3. Are you requesting that the SFHA designation be removed from (check one): !J/the entire legally recorded property? 1.!1 a portion of land within the bounds of the property? (A certified metes and bounds description and map of the area to be removed, certified by a licensed land surve yor 0 r registere d professional engineer, are required. Fo r the p referred format of metes and bounds descriptions, please refer to the MT-1 Form 1 Instructions.) o structures on the property? What are the dates of construction? 4. Is this req uest for a ( check one): o single structure o single lot ~ multiple structures (How many structures are involved in your request? List the number: t; ~ ) o multiple lots (How many lots are involved in your request? List the number: ) DHS -FEMA Form 81-87, DEC 07 Property Information Form MT -1 Form 1 Page 13 of 2 I I I I I I I I I I I I I I I I I I In addition to tllis form (MT-1 Fonn i), ALL requests must include the following: • Copy of the effective FIRM panel andlor Flood Boundary and Floodway Map (FBFM) (if applicable) on which the property location has been accurately plotted (property inadvertently located in the NFIP regulatory 1100dway will require Section B of MT-1 FOlm 3) • Copy of the Plat Map for the propelty (with recordation data and stamp of the Recorder's Office) OR • Copy of the property Deed (with recordation data and stamp of the Recorder's Office), accompanied by a tax assessor's map or other certified map showing the surveyed location of the property relative to local streets and watercourses • Form 2 -Elevation Form. Ifthe request is to remove the structure, and an Elevation Certificate has already been completed for this property, it may be submitted in lieu of Form 2. If the request is to remove the entire legally recorded property, or a portion thereof, the lowest lot elevation must be provided on Form 2. Please include a map scale and NOlth arrow on all maps submitted. For LOMR-Fs and CLOMR-Fs, the following must be SUbmitted in addition to the items listed above: • Form 3 -Community Acknowledgment Form Processing Fee (see instructions for appropriate mailing address; or, visit http://www.fema.gov/fhmlfrm_faas.shtm for the most current fee schedule) ReVised fee schedules are published perlodicany, but no more than once annually, as noted in the Federal Register. Please note: single/multiple lot(s)/structure(s) LOMAs are fee e)(empt The current review and processing fees are listed below: Cl1eck the fee that applies to your request D $325 (single lot/structure LOMR-F following a CLOMR-F) D $425 (single lot/structure LOMR-F) D $500 (single lot/structure CLOMA or CLOMR-F) [!?$700 (multiple lot/structure LOMR-F following a CLOMR-F, or multiple lot/structure CLOMAl D $800 (multiple lot/structure LOMR-F or CLOMR-F) Please submit the Payment Information Form for remittance of applicable fees. Please make your check or money order payable to: National Flood Insurance Program. Date ~ /1 /vOl {) Sig ature of Applicant (required) If you have any questions concerning DHS-FEMA policy, or the NFIP in general, please contact the FEMA Map Assistance Center toll free at 1-877- FEMA MAP (1-877-336-2627), or visit the Flood Hazard Mapping website at http://www.foma.gov/fhml. DHS -FEMA Form 81-87, DEC 07 Proparty Information Form MT-1 Form 1 Page 14 of 2 I I I I I I I I I I I I I I I I I I I U.S. DEPARTMENT OF HOMELAND SECURITY -FEDERAL EMERGENCY MANAGEMENT AGENCY ELEVATION FORM PAPERWORK BURDEN DISCLOSURE NOTICE O.lItB. NO. 1660-0015 Expires December 31, 2010 Public reporting burden for this fonn is estimated to average 1.25 hours per response. The burden estimate includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are not required to respond to this collection of infonnation unless a valid OMB control number appears in the upper right comer of this fonn. Send comments regarding the accurac y of the bur den esti mate and a ny suggestions for r educing this bur den to: Info nnation Collections Management, U.S. Department of Homeland Security, Fede ral Eme rgency Management Agency,S 00 C St reet, SW, Washington DC 20472, Paperwork Reduction Project (1660-0015). Submission of the form is required to obtain or retain benefits und er the National Flood Insura nce Progra m. Please do not send your completed survey to the above address. This form must be completed for requests and must be completed and signed by a registered professional engineer or licensed land surveyor. A DHS- FEMA National Flood Insurance Program (NFIP) Elevation Certificate may be submitted in lieu of this form for single structure requests. For requests to remove a structure on natural grade OR on engineered fill from the Special Floo d Hazard Area (SFHA), submit t he lowest adjacent grade (the lowest ground touching the structure), including an attached deck or garage. For requests to remove an entire parcel ofland from the SFHA, provide the lowest lot elevation; or, if the request involves an are a described by metes and bounds, provide the lowest elevation within the metes and bounds description. In order to process your request, all information on this fonn must be completed in its entirety. Incomplete submissions may result in processing delays. 1. NFIP Community Number:C>60 2.$ ~ Property Name or Address: I-lI'; c:.o~oj-1:V (l.:leI'I.~"", fi::, 2. Are the elevations listed below based on [Y1xisting or D proposed conditions? (Check one) 3. What is the elevation datum? ~GVD 29 D NAVD 88 D Other (explain) If any of the elevations listed below were computed using a datum different than the datum used for the effective Flood Insurance Rate Map (FIRM) (e.g., NGVD 29 or NAVD 88), what was the conversion factor? Local Elevation +/-ft. = FIRM Datum 4. Please provide the Latitude and Longitude of the most upstream edge of the structure (in decimal degrees): Indicate Datum: 0 NAD83 0 NAD27 Lat. Long. Please provide the Latitude and Longitude of the most upstream edge of the property (in decimal degrees): Indicate Datum: 0 NAD83 0 NAD27 Lat. Long. 5. For the existing o~osed structures listed below, what are the types of construction? (check all that apply) D crawl space slab on grade D basement/enclosure D other (explain) 6. Has DHS -FEMA identified this area as subject to land subsidence or uplifi? (see instrUctions) DYes ~o If yes, what is the date of the current releveling? / (month/year) Lowest Lot Number Block Lowest Lot Adjacent Base Flood BFE Source For DHS -FEMA Use Only Number Elevation' Grade To Elevation Structure If{}/.Sg) ')..2. ~ ~'i7. 0 "~"7. & r~'~c.r::..':2"c. .... ~,1:1~"" 4r~s 7,\ 2-~'3 "3~,". 0 '30 ~,"' 0 :.1:]S'.og U"",.~AS- This certification is to be signed and sealed by a licensed land surveyor, registered professional engineer, or arc hitect authorized by law to'certify elevation information. All docu ments submi tted in support of this request are correct to the be st of my kno wledge. .1 understa nd that an y fals e statement may be punishable by fine or imprisonment under Title 18 of the United States Code, Section 1001. . Certifiers Name.itl1,uO,v,l L g/'it2n".j License No.: '18,70 (0/ ) EXPir~i/i~t7" • Company Na~ .f:. . , ·d.s~ C/ .s.. ;k~O't:..,t::~J Telepholf~) fS~" 'f $'bo F~j~~l S$B -/1/'( . Signature: f L .§ '<~ . .7-Date: "ilc/Jo '// 'For requests involving a portion of property, include the lowest ground elevation within the metes and bounds description. Please note: If the Lowest Adjacent Grade to Structure is the only elevation provided, a determination will be issued for the structure only. Seal (optional) DHS -FEMA Form 81-87A, DEC 07 Elevation Form MT-1 Form 2 Page 15 of 2 I I I Continued from Page 1. Block Lowest Lot Lowest Base Flood Lot Number Number Elevation Adjacent Grade Elevation BFE Source For DHS -FEMA Use Only To Structure I.J.lX\ 5} 'l-'l-~ '3't4·0 '66f"l. 0 ';!.'3"".i • \0 "'~rAZ.A.s , I I I I I I This certification is to be signed and seal ed by a licensed land surveyor, re gistered professional engineer, or arc hitect autho rized by la w to certify elevation information. All documents submi tied in support of this request are correct to the be st of my kno wledge. I understa nd that an y false statement may be punishable by fine or imprisonment under Title 18 of the United States Code, Section 1001. I Certifie~ay~O~ f) L...}1,gt€7']!'-J License N0'Ycf/7Q (CA) Expira~n ~() /, 0 compa'1la,Ij1~" t.~ r g4rs OCIt:1c > Tele~s-r&e) S'S8:t SOU Fax rgs-f'JSS8-/fIY I Signature:~ ~~LJ.*--Date: IL t./t ~ {/ I I Seal (optional) I I I I I DHS -FEMA Form 81-87 A, DEC 07 Elevation Form MT-1 Form 2 Page 16 of 2 I I I I I I I I I I I I I I I I I I I I U.S. DEPARTMENT OF HOMELAND SECURITY -FEDERAL EMERGENCY MANAGEMENT AGENCY COMMUNiTY ACKNOWLEDGMENT FORM O.M.E. NO. 1660-0015 E.,-pires December 31,2010 PAPERWORK BURDEN DISCLOSURE NOTICE Public reporting burden for this form is estimated to average 1.38 hours per response. The burden estimate includes the time for reviewing instructions" searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are notTequired to respond to this collection of information unless a valid OMS control number appears in the upper right corner of this form. Send comments regarding the accurac y of the bur den esti mate and a ny suggestions for r educing this bur den to: Info rmation Collections Management, U.S. Department of Homeland Security, Federal Emergency Management Agency, 500 C St reet, SW, Washington DC 20472, Paperwork Reduction Project (1660-0015). Submission of the form is required to obtain or retain benefits und erthe National Flood Insurance Program. Please do not send your completed survey to the above address. This form must be completed for requests involvi ng the existing or proposed place ment offill (complete Section A) 0 R to provide acknowledgment of this request to remove a property from the SFHA which was previously located within the regulatory floodway (complete Section S). This form must be completed a nd signed b y th e official responsible for floodplain management in the community. The six digit NFIP community number and the subject property address must appear in the spaces provided below. Incomplete submissions may result in processing delays. Community Number: Property Name or Address: A. REQUESTS INVOLVING THE PLACEMENT OF FILL As the community official responsible for floodplain management, I hereby acknowledge that we have received and reviewed this Letter of Map Revisio,n Based on Fill (LOMR-F) or Conditional LOMR-F request. Based upon the community's review, we find the completed or proposed project meets or is designed to meet all of the community floodplain management requirements, including the requirement that no fill be placed in the regulatory f1ood""ay, and that all necessary Federal, State, and local permits have been, or in the case of a Conditional LOMR-F, will be obtained. In addition, we have determined that the land and any existing or proposed structures to be removed from the SFHA are or will be reasonably safe from'flooding as defined in 44CFR 65.2(c), and that we have available upon request by DHS-FEMA, all analyses and documentation used to make this determination. For LOMR-F requests, we understand that this request is being forwarded to DHS-FEMA for a possible map revision. For LOMR-F or Conditional LOMR-F requests that have the potential to impact an endangered species, documentation will be submitted to show that we have complied with Sections 9 and 10 of the Endangered Species Act (ESA). Section 9 of the ESA prohibits anyone from "taking" or harming an endangered species. It-an action might harm an endangered species, a permit is required from U.S. Fish and Wildlife Service or National Marine Fisheries Service under Section 10 of the ESA. For actions authorized, funded, or being carried out by Federal or State agencies, documentation from the agency showing its compliance with Section 7(a)(2) of the ESA will be submitted. Community Comments: Community Official's Name and Title: (Please Print or Type) Telephone No.: Community Name: Community Official's Signature: (reqUired) Date: B. PROPERTY LOCATED WITHIN THE REGULATORY FLOODWAY As the community official responsible for floodplain management, I hereby acknowledge that we have received and reviewed this request for a LOMA. We understand that this request is being forwarded to DHS-FEMA to determine if this property'has been inadvertently included in the regulatory floodway. We acknowledge that no fill on this property has been or will be placed within the designated regulatory floodway. We find that the completed or proposed project meets or is designed to meet all of the community floodplain management requirements. Community Comments: Community Official's Name and Title: (Please Print or Type) Telephone No.: Community Name: Community Official's Signature (required): ' Date: DHS -FEMA Form 81-878, DEC 07 Community Acknowledgment Form MT-1 ,Form 3 Page 17 of 1 I I I Community Name: Project Identifier: FEDERAL EMERGENCY MANAGEMENT AGENCY PAYMENT INFORMATION FORM c..\~, ~ ~C',~~ '-~ CO ~~ ~~""'" ':2... c;.:. I THIS FORM MUST BE MAILED, ALONG WITH THE APPROPRIATE FEE, TO THE ADDRESS BELOW OR FAXED TO THE FAX NUMBER BELOW. I I I I I I Type of Request: ~MT-1 application } D MT-2 application D EDR application } Request No.: _____ _ (if known) LOMC Clearinghouse 6730 Santa Barbara Court Elkridge, MD 21075 FEMA Project Library 847 South Pickett St. Alexandria, VA 22304 FAX (703) 212-4090 Amount: '\" 00 . 00 o INITIAL FEE* D FINAL FEE D FEE BALANCE** D MASTER CARD D VISA D CHECK D MONEY ORDER *Note: Check only for EDR and/or Alluvial Fan requests (as appropriate). **Note: Check only if submitting a corrected fee for an ongoing request. I COMPLETE THIS SECTION ONLY IF PAYING BY CREDIT CARD I I I I I I I I CARD NUMBER I I I I I-I I I I I 1234 5678 Date NAME (AS IT APPEARS ON CARD): (please print or type) ADDRESS: (for your credit card receipt-please print or type) DAYTIME PHONE: FEMA Form 81-107 I I I I I I I I I I 9 10 11 12 13 14 15 16 Signature Payment Information Form EXP.DATE OJ CD Month Year I I I I I I I I I I I I I I I I I I I EXHIBIT "A" LEGAL DESCRiPTION A PORTION OF LOT 223 lYING WITHIN THE BOUNDARY OF CITY OF CARLSBAD TRACT 99-04-02, VILLAGES OF lA COSTA -LA COSTA RIDGE, IN THE CITY OF CARLSBAD, COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, ACCORDING TO MAP THEREOF NO. 14838, FilED IN THE OFFICE OF THE SAN DIEGO COUNTY RECORDER, JULY 14, 2004 AS FilE NO. 2004-0655633, OF OFFICIAL RECORDS, BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHEAST CORNER OF LOT 233 OF MAP 14379 IN THE CITY OF CARLSBAD, COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, FILED IN THE OFFICE OF THE SAN DIEGO COUNTY RECORDER, APRil 29, 2002 AS FILE NO. 2002-0358064, OF OFFICIAL RECORDS; THENCE ALONG THE NORTHERLY LINE OF SAID lOT 233, SOUTH 65°28'00" WEST, 256.41 FEET; THENCE LEAVING SAID NORTHERLY LINE, NORTH 24°32'00" WEST, 25.97 FEET; THENCE NORTH 64°35'00" EAST, 191.04 FEET; THENCE NORTH 16°10'00" EAST, 80.83 FEET; THENCE NORTH 30°20'00" EAST, 71.68 FEET; THENCE SOUTH 67°00'00" EAST, 14.96 FEET TO THE CENTERLINE OF THE ROAD EASEMENT PER DOCUMENT RECORDED APRIL 7,1966 AS DOCUMENT NO. 58549 OF OFFICIAL RECORDS; THENCE ALONG SAID CENTERLINE SOUTH'00031'43" WEST, 118.88 FEET TO THE BEGINNING OF A TANGENT 400.00 FOOT RAOIUS CURVE, CONCAVE EASTERLY, THENCE SOUTHERLY ALONG THE ARC OF SAID CURVE THROUGH A CENTRAL ANGLE OF 01 °59'47" A DISTANCE OF 13.94 FEET TO THE POINT OF BEGINNING. CONTAINING 0.293 ACRES, MORE OR lESS. APN 223-720-03 M&Zd 5.o,o·Zao7 DAVID • AMBLER LS.7322 HUNSAKER & ASSOCIATES SAN DIEGO, INC. :M:\ 1751\ 136\Legal Description\A01.doc WO 1751-136 3/6/07 PAGE 1 OF 1 I I I I I I I I I I I I I I I I I I I o ~ EXHIBIT B PORTION OF LOT 223 -MAP NO. 14838 I ", ~~~y -SCALE 1:::roo~ \ \ \ \ \ \ \ MAP NO. 14BSB \ 223 \ APN 223-720-03 \ \ N24"32 '00 "W 25.97' MAP 14319 LOT 233 HUNSAKER & ASSOCIATES SAN DIEGO. INC. 10179 J-kleMeI:ens Street San DIego, Ca 92121 PH(858)558-4500· FX(85B)55&1414 ) POB NE COR LOT 233 ~ ? L ROAD EAS. 4/7/1966, F/P. 58549, O.R. ~ A=01'59'47" R=400.00' \ L=13.94' \ \ f:/§ITJl.'2fi."f;(.Bl lvJAP -]4'319 cARLSBAD VICINITY MAP N. T.S. I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 2 FLOODPLAIN ANALYSIS METHODOLOGY HEC-RAS DE:de h:\reportsI17511136UomrUomr_01.doc w.o.1751·136 9/10/200910.06 AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 2 METHODOLOGY -FLOODPLAIN ANALYSIS 2.1 Model Selection HEC-RAS River Analysis System This software allows for the modeling water surface profiles for one-dimensional steady gradually-varied flow. The basic computational procedure is based upon the solution of the one-dimensional energy equation. Energy losses are evaluated by friction (Manning's equation) and contraction/expansion (coefficient multiplied by the change in the velocity head). The momentum equation is used in situations where the water surface profile is rapidly varied. These situations include mixed-flow regime calculations (such as hydraulic jumps), hydraulics of bridges, and evaluating profiles at river confluences. The effects of various obstructions such as bridges, culverts, weirs, and structures in the floodplain may be considered in the computations. This software is designed for the computation of FEMA floodplain boundaries and floodway encroachm~nts. 2.2 Cross Section Data Cross Section Locations Hydraulic model cross sections are generally taken where a change in channel geometry or a flow change takes place. Cross sections for this analysis have been taken approximately every fifty (50) feet. Where bridges, culverts, or other obstructions block the flow path, a lower cross section interval is necessary. 2.3 HEC-RAS Model DeSign Input Parameters Starting Wa~er Surface Elevations Boundary conditions are necessary to establish the starting water surface elevation at the upstream and downstream ends of a river system. A starting water surface elevation is necessary for the program to begin calculations. In a subcritical flow regime, boundary conditions are necessary at the downstream end of the river system. Supercritical flow regimes require boundary conditions at the upstream end of the river system. In a mixed-flow regime, boundary conditions are required at both the upstream and downstream ends. DE:de h:lreports\1751\136UomrUomr_Ol.doc w.o.1751-136 9/10/200910'06 AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill The four types of boundary conditions are: 1. Known Water Surface Elevation 2. Critical Depth 3. Normal Depth 4. Rating Curve In this analysis, as no existing FEMA study exists for the San Marcos Creek at this location, upstream and downstream known water surface elevations are unknown. Hence, a normal depth calculation was applied for the downstream water $urface elevation and upstream critical depth slope was used in the developed conditions analysis for the San Marcos Creek analysis. Manning's Roughness Coefficients Manning's values ranging from 0.035 to 0.1 were used to represent the proposed developed graded and existing embankments of the San Marcos Creek. DE:de h·\reportsI17511136UomrUomr_01.doo w.o.1751-136 9/10/200910:Q6AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill FEMA SEDIMENT ANALYSIS NOTE: Sediment transport modeling was not considered for this analysis as the upstream watershed is fully developed. DE.de h:lreportsI17511136UomrUom,-01.doc w.o.17S1-136 9/10/200910:06 AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 3 PRE-DEVELOPED CONDITIONS HEC-RAS RESULTS DE-de h:\reports\1751 \136\1omr\lomr_01.doc w.o.1751.136 9/10/200910:06AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 3.1 PRE-DEVELOPED SUMMARY TABLE DE:de h.\reports\17S1I136~omrIJomr_01.doo w.o.17S1-136 91101200910:06AM - - -------- - - - - - - - - - HEC-RAS Plan: Existing River: San Marcos Creek Reach: 1 Profile: PF#1 Reach. 'River"S!a Profile", :", ,Q,iJ;p!~I'" " ' 'Min;Q~E( : .. ':W';~::·E!~y, ,; ,~" 'Orit;ijv..S," _: ::,':~:<-1;:,EJev' • ,.";E,(3~ §i9,pe ; ',:V~IOhril, ' .' 'FlqWN!:l? " TopWidth Frol,Joe,# Chi (cfs) (ft) ". "(fI:) I. (it), '(it); (\tift), : .~ , 'l(ftlS.) ". .. .(~q,:ft) (ft) 1 11 PF,#1 13000.00 323.50 338.41 332.22 338.86 0.007506 5.42 2410.28 289.09 0.32 1 10;5 Bridge 1 '10 PF#1 13000,00 321,50 ' 337.02 337.24 0.002363 3.79 3520.51 324.89 0.19 1 9 PF#1 13000.00 320.50 336.25 336.78 0.006172 5.91 2368.25 288.82 0.31 1 8 PF#1 13000.00 320.40 335.88 336.27 0.005562 5.18 2667.88 544.13 0.29 1 7 PF#1 13000.00 319.72 335.08 335.52 0.007030 5.96 2660.80 390.63 0.32 1 6 PF#1 13000.00 318.60 334.08 334.69 0.009309 6,32 2136.27 271,72 0.36 1 5 PF#1 13000.00 318.33 333.10 333.81 0,011158 6.82 1930.75 229.36 0.40 1 4 PF#1 13000.00 317.44 331.92 332.77 0.013805 7.37 1770.89 208.82 0.44 1 3 PF#1 13000.00 315.90 330.59 331.53 0.013230 7.78 1671.01 169.45 0.43 1 2 ' PF#1 13000.00 314.34 328.27 329.76 0.021693 9.78 1329.82 135.19 0.55 1 1 PF#1 13000.00 311.76 323.71 323.71 328.29 0.008168 17.28 773.68 90.76 0.96 ~~-----~---.. - I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 3.1.1 CHANNEL CROSS SECTIONS DE:de h.\reports\1751\13S\Jomr\lomr_01.doC W.O.1751-136 911 OJ20091 0:06 AM - - g c 0 ~ > <ll ill g c 0 ~ > <ll ill - - ----- - San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 11 350 ~.1-+ .1 +.11 345 340 335 330 325 320 850 900 950 1000 1050 1100 1150 1200 1250 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 10.5 BR 355 r-.1-+ .1 + .11 350 345 340 335 330 325 320 Legend WS PF#1 Crit PF#1 • Ground 4) Bank Sta Legend WS PF#1 ." Crit PF#1 • Ground • Bank Sta 700 800 900 1000 1100 1200 Station (ft) I g c 0 15 > <ll ill g c o i ill - - -- - ~ -- San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 10.5 BR 355 ~.1-+ .1 +.11 350 345 340 335 330 325 320 I I I I I I I I I 850 .900 950 1000 1050 1100 1150 1200 1250 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 Legend WS PF#1 Crit PF#1 Ground Q> Bank Sta River = San Marcos Creek Reach = 1 RS = 10 Cross Section #10 . .1~1( .1 ~~.1-J 350-'" I 345 340 335 330 325 320 70() 800 900 1000 1100 1200 Station (ft) Legend WS PF#1 Ground «) Bank Sta - -- g c 0 :; > Q) ill is c .Q ro > Q) ill - ----- - - ---- ---- San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 9 Cross section #9 .1 >i< .1-+-.1---1 370 Legend WS PF#1 360 • Ground eI Bank Sta 350 340 330 3201, ", "11""--;"',, ", " 700 800 900 1000 1100 1200 1300 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 7 Cross-Section #7 380 .1-+.1 + .1 1 370 360 350 340 330 320 310 'I , , , , , ,,' , , 600 700 800 900 1000 1100 1200 1300 1400 Station (ft) Legend WS PF#1 Ground • Bank Sta San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 8 Cross section #8 Legend 370 .1-f-.1--f--;-.1 )1 \ WS PF#1 360 1 • Ground -A- g Ineff 350 @ c Bank Sta 0 ~ > Q) 340 ill 330 320 1 ¥ 600 800 1000 1200 1400 1600 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 6 Cross-Section #6 400 1< .1-+-.1-+-.14 Legend WS PF#1 380 g 360 Ground e Bank Sta c o 1ti ~ 340 w 320 300 1 ,', 400 600 800 1000 1200 Station (ft) 1400 - - - is c 0 ~ > Q) ill £ c 0 "" III > Q) ill ----- - -- - -- - ---- San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 5 Cross-Section #5 400 I( .1-+-.1-+-.1---1 Legend WS PF#1 380 • Ground () Bank Sta 360 340 320 300 400 600 800 1000 1200 1400 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 3 Cross-Section #3 400 t<-.1-+-.1 + .1 )1 380 360 340- 320 300 I I I I I I I I I 700 800 900 1000 1100 1200 1300 1400 1500 Station (ft) Legend WS PF#1 Ground • Bank Sta San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 4 Cross-Section #4 400 Legend .1-+--.1 )I( .1~ 380 1 \ WS PF#1 • Ground c is Bank Sta 360 c 0 15 > Q) 340 ill 320 300 I I I I I I I I I 600 700 800 900 1000 1100 1200 1300 1400 Station (ft) San Marcos Creek-Existing Plan: Existing 3/5/2007 River = San Marcos Creek Reach = 1 RS = 2 Cross-Section #2 400-r--.1-+-.1--+ .1 )1 Legend WS PF#1 380 is 360 Ground o Bank Sta c o ~ > ..'!1 340 w 320 300 I I I I I I I I I 800 900 1000 1100 1200 1300 1400 1500 1600 Station (ft) - - - g c 0 ~ > a> ill ---- --- - San Marcos Creek-Existing Plan: Existing 3/5/2007 River; San Marcos Creek Reach; 1 RS ; 1 Cross-Secllon #1 DIS (Dr. Chang's Cross Seclion #6.047) 370 r _035 +.035+ .035 )1 360 350 340 330 320 310+1~1~~rr~ro~~ .. ~rr"~TT~ .. ,,-r~ 800 900 1000 1100 1200 1300 1400 1500 Station (ft) Legend WS PF#1 Crit PF#1 Ground • Bank Sta - ----- --- I I I I I I I I I I I I I I I I I I· I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 3.1.2 CHANNEL PROFILE DE:de h:\reports\1751\136\lomr\lomr_01.doc w.o;1751-136 9110/200910:06AM I I I I I I I I I I I I 'I I 'I ,I I ':1 I g c: o 350 340 ~ 330 ill 320 o 1 in Horiz. = 100 ft -1 in Vert. = 5 ft 200 400 San Marcos Creek-Existing Plan: Existing 3/5/2007 San Marcos Creek 1 )1 Legend WS PF#1 .. -.-+_ ..... Crit PF#1 Ground ,-- .~ ... -' ...... -' _ ... -' --_ .. ' , ) \ .1 1000 600 800 I Main Channei pistance (ft) f I I 1200---'-----------' I I I I I I I' I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 3.1.3 PRE-DEVELOPED CONDITION HEC-RAS REPORT DE:de h:\reports\1751\136Uomrllom,-Ol.doc w 0.1751-136 9/10/200910:06AM I I I I I I I I I I I I I I I I I I I SMC_Existing.rep HEC-RAS version 3.1.3 May 2005 u.s. Army corp of Engineers Hydrologic Engineering Center 609 second Street Davis, california x x ~ XXXX XXXX xx x X X X X X X X X XXXXXXX XXXX X XXX X X X X X X X X X X X ~ XXXX PROJECT DATA project Title: San Marcos creek-Existing project File: SMC_Existing.prj Run Date and Time: 3/5/2007 5:13:36 PM project in English units project Description: San Marcos creek Floodplain Analysis PLAN DATA X X X X X X X X XXXX ~ X X X X X X X X X X X X XXXX X X XXXX X X XXXXX plan Title: Existing plan File: C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMC_Existing.p03 Geometry Title: Existing conditions Geometry File: C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMC_Existing.g03 Flow Title : Existing conditions Flow File : C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMC_Existing.f02 plan summary Information: Number of: Cross Sections culverts = Bridges 11 o 1 Multiple openings Inline Structures = Lateral Structures = computational Information Water surface calculation tolerance = Critical depth calculation tolerance = Maximum number of iterations = Maximum difference tolerance = Flow tolerance factor = 0.01 0.01 20 0.3 0.001 computation options critical depth computed only where necessary conveyance calculation Method: At breaks in n values only Friction slope Method: Average conveyance computational Flow Regime: Mixed Flow page 1 o o o I I I I I I I I I I I I I I I I I I I SMC_Existing.rep FLOW DATA Flow Title: Existing conditions Flow File : C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMC_Ex;sting.f02 Flow Data (cfs) River Reach San Marcos creek1 San Marcos creek1 Boundary conditions River Downstream Reach San Marcos creek1 Normal S = 0.028 GEOMETRY DATA RS 11 7 profi 1 e PF#l PF#l 13000 13000 upstream critical Geometry Title: Existing conditions Geometry File: C:\Documents and Settings\dedwards\Desktop\san Marcos Creek rev-2-24-03\SMC_Existing.g03 CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 11 INPUT Description: station Elevation Data num= 31 Sta Elev Sta Elev sta Elev Sta Elev Sta 856 350 862 348 867.1 346 872.7 344 880.2 886.5 340 893.7 338 899 336 905.9 334 913 .7 918.4 330 936.1 329 949.9 328 964.1 327 975.3 1000 324 1013.7 323.5 1030 324 1052.9 326 1062.2 1071.5 328 1076.5 329 1080.3 330 1083.7 332 1087 1i73 336 1179.8 338 1187.3 340 1195 342 1202.4 1210.5 346 Manning's n values num= 3 Sta n val Sta n val sta n val 856 .1 899 .1 1173 .1 Bank Sta: Left Right Lengths: Left Channel Right coeff Cont r . 899 1173 219 219 219 .1 CROSS SECTION OUTPUT profile #PF#l page 2 Elev 342 332 326 327 334 344 Expan. .3 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep E . G. El ev (ft) 338.86 Element Left OB channel Right OB vel Head (ft) 0.46 Wt. n-val. 0.100 0.100 0.100 W.S. Elev (ft) 338.41 Reach Len. (ft) 0.10 0.10 0.10 Crit W.S. (ft) 332.22 9.88 Flow Area (sq ft) 7.76 2392.65 E.G. slope (ft/ft) 0.007506 Area (sq ft) 7.76 2392.65 9.88 Q Total (cfs) 13000.00 Flow (cfs) 10.51 12975.61 13.88 TOp width (ft) 289.09 TOp width (ft) 6.77 274.00 8.33 vel Total (ft/s) 5.39 Avg. vel. (ft/s) 1. 35 5.42 1.40 Max chl Dpth (ft) 14.91 Hydr. Depth (ft) 1.15 8.73 1.19 Conv. Total (cfs) 150048.5 Cony. (cfs) 121. 3 149767.0 160.2 Length Wtd. (ft) 0.10 Wetted Per. (ft) 7.19 276.74 8.67 Min ch El (ft) 323.50 shear (lb/sq ft) 0.51 4.05 0.53 Alpha 1.01 Stream Power (lb/ft s) 0.69 21.97 0.75 Frctn Loss (ft) 0.00 Cum volume (acre-ft) 0.83 50.46 5.72 C & E LOSs (ft) 0.02 Cum SA (acres) 0.31 4.96 1. 51 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. BRIDGE RIVER: San Marcos creek REACH: 1 RS: 10.5 INPUT Description: Distance from upstream XS = .1 Deck/Roadway width = 200 weir coefficient = 2.6 upstream Deck/Roadway coordinates num= 2 Sta Hi cord La Cord Sta Hi cord La cord o 355 350 1202.4 349 344 upstream Bridge Cross section Data Station Elevation Data num= 31 Sta Elev Sta Elev Sta Elev 856 350 862 348 867.1 346 886.5 340 893.7 338 899 336 918.4 330 936.1 329 949.9 328 1000 324 1013.7 323.5 1030 324 Page 3 Sta Elev Sta Elev 872.7 344 880.2 342 905.9 334 913.7 332 964.1 327 975.3 326 1052.9 326 1062.2 327 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep 1071.5 328 1076.5 329 1080.3 330 1173 336 1179.8 338 1187.3 340 1210.5 346 Manning's n Values num= 3 Sta n val Sta n val Sta n val 856 .1 899 .1 1173 .1 Bank Sta: Left Right coeff Contr. Expan. 899 1173 .1 .3 Downstream Deck/Roadway coordinates num= 2 Sta Hi cord Lo cord Sta Hi cord Lo cord 0 355 350 1191.8 349 344 Downstream Bridge Cross Section Data station Elevation Data num= 29 Sta Elev Sta Elev Sta Elev 799.3 350 806.4 348 812.5 346 831. 5 340 837.6 338 843.9 336 862.5 330 885.5 330 899.3 329 951.9 323 971 322 1000 321. 5 1078.5 324 1140.6 330 1147.6 332 1169.3 338 1177 340 1184.5 342 Manning's n values num= 3 Sta n val Sta n val Sta n val 799.3 .1 862.5 .1 1140.6 .1 Bank Sta: Left Right coeff Contr. Expan. 862.5 1140.6 .1 .3 = = flow = = = = 1083.7 332 1087 1195 342 1202.4 Sta Elev Sta 818.9 344 825.3 850.3 334 856.5 904 328 910.9 1033.1 322 1064.7 1155.2 334 1161.7 1191.8 344 o horiz. to 1.0 vertical o horiz. to 1.0 vertical .95 upstream Embankment side slope Downstream Embankment side slope Maximum allowable submergence for weir Elevation at which weir flow begins Energy head used in spillway design spillway height used in design weir crest shape Broad crested Number of piers = 2 pier Data pier Station Upstream= 961. 7 Downstream= 957.4 upstream num= 2 width El ev width El ev 15 326 15 350 Downstream num= 2 width Elev width Elev 15 327 15 350 pi er Data pier station upstream= 1059.7 Downstream= 1059.1 upstream num= 2 width El ev width Elev 15 323 15 350 Downstream num= 2 width Elev width Elev 15 329 15 350 Number of Bridge coefficient Sets = 1 Page 4 334 344 Elev 342 332 327 323 336 I I I I I I I I I I I I I I I I I I I Low Flow Methods and Data Energy SMC_Existing.rep selected Low Flow Methods Highest Energy Answer High Flow Method Energy only Additional Bridge Parameters Add Friction component to Momentum DO not add weight component to Momentum class B flow critical depth computations use critical depth inside the bridge at the upstream end criteria to check for pressure flow = Upstream energy grade line BRIDGE OUTPUT profile #PF#l E.G. us. (ft) 338.86 Inside BR DS W.S. us. (ft) 338.41 337.32 Q Total (cfs) 13000.00 337.03 Q Bridge (cfs) 13000.00 329.27 Q weir (cfs) 15.53 weir Sta Lft (ft) 4.20 weir Sta Rgt (ft) 3097.14 weir Submerg 0.22 weir Max Depth (ft) 20586.61 Min El weir Flow (ft) 349.01 10.50 Min El Prs (ft) 345.67 354.71 Delta EG'(ft) 1.62 202231.7 Delta WS (ft) 1.39 294.99 BR open Area (sq ft) 3874.77 0.06 BR open vel (ft/s) 6.47 0.02 coef of Q 2.25 Br sel Method Energy only 9.45 Element Inside BR US E.G. Elev (ft) 338.84 W.S. Elev (ft) 338.19 Crit W.S. (ft) 332.98 Max chl Dpth (ft) 14.69 vel Total (ft/s) 6.47 Flow Area (sq ft) 2009.33 Froude # chl 0.40 specif Force (cu ft) 13292.96 Hydr Depth (ft) 7.80 W.P. Total (ft) 305.81 Conv. Total (cfs) 107030.2 TOp width (ft) 257.47 Frctn Loss (ft) 1.41 C & E Loss (ft) 0.11 shear Total (lb/sq ft) 6.05 Power Total (lb/ft s) 39.15 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION page 5 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep RIVER: San Marcos creek REACH: 1 RS: 10 INPUT Description: Cross section #10 station Elevation Data Sta Elev Sta 799.3 350 806.4 831.5 340 837.6 862.5 330 885.5 951.9 323 971 1078.5 324 1140.6 1169.3 338 1177 Manning's n values Sta n val Sta 799.3 .1 862.5 Bank Sta: Left Right 862.5 1140.6 num= 29 Elev Sta Elev Sta 348 812.5 346 818.9 338 843.9 336 850.3 330 899.3 329 904 322 1000 321. 5 1033.1 330 1147.6 332 1155.2 340 1184.5 342 1191.8 num= 3 n val Sta n val .1 1140.6 .1 Lengths: Left channel Right 198 120.5 71.1 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 W.S. Elev (ft) 71.10 crit W.S. (ft) 87.80 E.G. slope (ft/ft) 87.80 Q Total (cfs) 142.94 TOp Width (ft) 24.98 vel Total (ft/s) 1. 63 Max chl Dpth (ft) 3.52 cony. Total (cfs) 2940.7 Length wtd. (ft) 25.95 Min ch El (ft) 0.50 Alpha 0.81 Frctn Loss (ft) 5.46 c & E LOSS (ft) 1.42 337.24 0.22 337.02 0.002363 13000.00 324.89 3.69 15.52 267441. 5 120.07 321. 50 1.04 0.43 0.03 Element Wt. n-Val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) Wetted per. (ft) shear (lb/sq ft) Stream Power (lb/ft s) Cum volume (acre-ft) Cum SA (acres) Elev 344 334 328 322 334 344 Sta 825.3 856.5 910.9 1064.7 1161.7 Elev 342 332 327 323 336 coeff Contr. .1 Expan . . 3 Left OB Channel 0.100 0.100 198.00 120.50 75.62 33'S7 . 09 75.62 3357.09 121.05 12736.01 21. 81 278.10 1.60 3.79 3.47 12.07 2490.3 262010.6 22.92 278.88 0.49 1..78 0.78 6.74 0.60 37.78 0.23 3.72 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. page 6 I I I I I I I I I I I I I I I I I I I CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 9 INPUT Description: Cross section #9 station Elevation Data num= Sta Elev Sta Elev 798.7 370 845.7 360 984.7 322 995.5 321 1039.9 323 1119 330 1222 338 1266.2 340 Manning's n values num= Sta n val Sta n val 798.7 .1 935.5 .1 Bank Sta: Left Right Lengths: 935.5 1119 SMC_Existing.rep 17 Sta 875.6 1000 1135.3 3 Sta 1119 Left 75 Elev Sta 350 911 320.5 1022.2 332 1155.7 n val .1 Channel Right 81.4 35 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) 336.78 Right OB vel Head (ft) 0.52 0.100 W.S. Elev (ft) 336.25 35.00 crit W.S. (ft) 216.79 E.G. Slope (ft/ft) 0.006172 216.79 Q Total (cfs) 13000.00 453.84 TOp Width (ft) 288.82 90.00 vel Total (ft/s) 5.49 2.09 Max chl Dpth (ft) 15.75 2.41 Conv. Total (cfs) 165472.9 5776.8 Length Wtd. (ft) 79.39 90.27 Min ch El (ft) 320.50 0.93 Alpha 1.12 1.94 Frctn Loss (ft) 0.46 5.21 C & E Loss (ft) 0.04 1. 33 CROSS SECTION RIVER: San Marcos Creek Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOP Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted per. (ft) shear (lb/sq ft) Stream Power (lb/ft s) Cum volume (acre-ft) cum SA (acres) Page 7 Elev Sta 340 935.5 321 1032.8 334 1207.1 coeff Contr. .1 Elev 330 322 336 Expan. .3 Left OB Channel 0.100 0.100 75.00 81.40 47.93 2103.54 47.93 2103.54 113.66 12432.50 15.32 183.50 2.37 5.91 3.13 11.46 1446.7 158249.4 16.55 184.65 1.12 4.39 2.65 25.94 0.32 30.22 0.15 3.08 I I I I I I I I I I I I I I I I I I I REACH: 1 RS: 8 INPUT Description: Cross section #8 station Elevation Data num= Sta Elev Sta Elev 785.4 370 838.2 360 992.3 321 1000 320.4 1180.3 331 1187.9 332 1228.6 336 1234.9 337 1274.7 339 1280.6 338 1301.9 334 1320.1 333 1391.1 329 1431.5 329 1451.3 333 1460.2 334 1488.9 337 1490.1 336 1519.5 334 1522 335 1540.8 339 1544.3 340 Manning's n values sta n val Sta 785.4 .. 1 926.6 num= n val .1 SMC_Existing.rep 52 Sta 868 1010.8 1201 1242.3 1286.7 1356.6 1435.3 1464 1491. 9 1524 3 Elev 350 321 333 338 337 332 330 335 335 336 Sta n val 1159 .1 Sta 891.2 1061.9 1221. 8 1248.2 1293.4 1380.4 1441.3 1484.9 1493.5 1526.6 Bank Sta: Left Right 926.6 1159 Ineffective Flow num= Lengths: Left channel 111. 43 120.3 1 Right 120 Sta L Sta R Elev Permanent 1269.7 1544.3 F CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 w.s. Elev (ft) 120.00 crit W.S. (ft) 246.95 E.G. slope (ft/ft) 1065.28 Q Total (cfs) 636.91 Top width (ft) 290.93 vel Total (ft/s) 2.58 Max chl Dpth (ft) 3.57 Cony. Total (cfs) 8540.5 Length wtd. (ft) 69.55 Min ch El (ft) 1. 23 Alpha 3.18 Frctn LosS (ft) 4.70 C & E LOSS (ft) 1.17 336.27 0.40 335.88 0.005562 13000.00 544.13 4.87 15.48 174319.1 120.20 320.40 1.08 0.75 0.00 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow Ccfs) Top width Cft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted Per. (ft) shear (lb/sq ft) Stream Power (lb/ft s) Cum volume Cacre-ft) Cum SA (acres) page 8 Elev 340 326 334 339 336 331 331 336 334 337 Sta 926.6 1159 1224.7 1267.9 1297.8 1385.9 1447.5 1486.2 1509.8 1530.8 coeff Contr. .1 Left OB 0.100 111.43 61.13 61.13 135.45 20.80 2.22 2.94 1816.3 21.62 0.98 2.18 0.23 0.12 Elev 330 330 335 340 335 330 332 337 333 338 Expan. .3 channel 0.100 120.30 2359.80 2359.80 12227.63 232.40 5.18 10.15 163962.3 233.38 3.51 18.19 26.05 2.69 I I SMC_Existing.rep warning: Divided flow computed for this cross-section. I CROSS SECTION I I I I I I I I I I I I I I RIVER: San Marcos creek REACH: 1 RS: 7 INPUT Description: Cross-section #7 Station Elevation Data num= 43 Sta Elev Sta Elev Sta Elev Sta 690.83 380 700.99 379 708.72 378 715.2 373 759.89 360 834.47 335 912.77 734.77 375 746.46 374 751.91 786.63 370 810.33 365 825.61 860.33 345 877.96 340 896.84 976.57 321 991.2 320 1000 319.72 1008.84 328 1123.73 333 1283.74 338 1343.06 340 1040.6 326 1084.17 327 1117.93 1157.38 331 1181.4 332 1251.87 1329.86 337 1334.26 338 1338.83 1357.9 338 1360.31 339 1362.92 Manning's n Values Sta n val Sta 690.83 .1 896.84 Bank Sta: Left Right 896.84 1040.6 num= 3 n val Sta .1 1040.6 n val .1 Lengths: Left channel Right 73.52 100.15 106.36 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 w.s. Elev (ft) 106.36 crit W.S. (ft) 1134.30 E.G. slope (ft/ft) 1134.30 Q Total (cfs) 3906.10 TOp Width (ft) 246.56 vel Total (ft/s) 3.44 Max chl Dpth (ft) 4.60 Cony. Total (cfs) 46587.4 Length wtd. (ft) 246.84 Min ch El (ft) 2.02 Alpha 6.95 Frctn LOSs (ft) 1.67 C & E Loss (ft) 0.43 335.52 0.44 335.08 0.007030 13000.00 390.63 4.89 15.36 155049.0 101. 05 319.72 1.19 0.81 0.02 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Cony. (cfs) wetted Per. (ft) shear (lb/sq ft) Stream power (lb/ft Cum volume (acre-ft) Cum SA (acres) Page 9 s) Elev Sta 377 725.82 372 774.04 355 844.96 330 940.14 320 1026.08 329 1133.52 335 1326.22 337 1346.97 coeff Contr. .1 Left OB 0.100 73.52 0.01 0.01 0.00 0.30 0 .. 14 0.04 0.0 0.31 0.02 0.00 0.15 0.09 Elev 376 371 350 325 325 330 336 337 Expan. .3 Channel 0.100 100.15 1526.49 1526.49 9093.90 143.76 5.96 10.62 108461.6 145.99 4.59 27.34 20.69 2.17 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep CROSS SECTION RIVER: San Marcos Creek REACH: 1 RS: 6 INPUT Description: cross-section #6 station Elevation Data num= 46 Sta Elev Sta Elev Sta Elev Sta 494.93 400 575.47 390 646.09 380 691.53 370 782.6 345 869.91 320 998.26 325 1050.43 328 1109.3 333 1161.47 336 1243.21 337 1289.96 717.87 372 729.09 371 743.03 821.87 355 835.98 350 851.78 908.58 330 946.47 325 978.84 1008.06 319 1017.19 320 1033.51 1089.48 327 1099.19 327 1104.43 1136.33 331 1148.98 332 1155.99 1173.87 336 1217.5 336 1240.48 1258.48 337 1259.35 337 1283.41 1295 340 Manning's n Values Sta n val Sta 494.93 .1 908.58 Bank Sta: Left Right 908.58 1123.14 num= 3 n val Sta .1 1123.14 n val .1 Lengths: Left channel Right 84.54 84.95 104.32 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 w. s. El ev (ft) 104.32 crit W.S. (ft) 94.28 E.G. slope (ft/ft) 94.28 Q Total (cfs) 243.76 TOp Width (ft) 38.68 vel Total (ft/s) 2.59 Max chl Dpth (ft) 2.44 Cony. Total (cfs) 2526.5 Length Wtd. (ft) 38.93 Mi n ch El (ft) 1.41 Alpha 3.64 Frctn Loss (ft) 0.17 c & E LOSS (ft) 334.69 0.61 334.08 0.009309 13000.00 271. 72 6.09 15.48 134739.2 85.15 318.60 1.06 0.87 0.01 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) Wetted Per. (ft) shear (lb/sq ft) Stream power (lb/ft s) Cum volume (acre-ft) Cum SA (acres) page 10 Elev Sta 374 703.41 365 805.03 340 885.95 319 1000 326 1068.05 329 1123.14 334 1165.61 336 1248.98 338 1292.73 coeff Contr. .1 Left OB 0.100 84.54 37.74 37.74 85.72 18.48 2.27 2.04 888.5 18.93 1.16 2.63 0.12 0.07 Elev 373 360 335 318.6 327 330 335 336 339 Expan. .3 channel 0.100 84.95 2004.24 2004.24 12670.52 214.56 6.32 9.34 131324.3 216.45 5.38 34.02 16.63 1. 76 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep 0.09 CROSS SECTION RIVER: San Marcos Creek REACH: 1 RS: 5 INPUT Description: cross-section #5 station Elevation Data num= 40 Sta Elev Sta Elev sta 556.43 400 621.34 390 661.36 712.94 365 731.07 360 764.68 834.73 340 854.24 335 873.72 994.55 319 1000 318.33 1010.91 1042.53 326 1049.61 327 1065.12 1077.18 329 1081.03 330 1097.16 1153.06 350 1164.99 351 1175.25 1247.54 350 1259.68 349 1274.6 Manning's n values Sta n val Sta num= 3 n val Sta 556.43 .1 873.72 .1 1081.03 Elev Sta 380 678.15 355 791. 66 330 913.94 319 1018.9 327 1073.66 335 1111. 87 352 1209.45 348 1305.63 n val .1 Bank Sta: Left Right 873.72 1081. 03 Lengths: Left channel Right 106.38 83.7 84.95 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) 333.81 Right OB vel Head (ft) 0.72 0.100 W.S. Elev (ft) 333.10 84.95 crit W.S. (ft) 15.46 E.G. slope (ft/ft) 0.011158 15.46 Q Total (cfs) 13000.00 31. 50 TOP Width (ft) 229.36 9.99 vel Total (ft/s) 6.73 2.04 Max chl Dpth (ft) 14.77 1. 55 Cony. Total (cfs) 123071.4 298.2 Length wtd. (ft) 83.74 10.46 Min ch El (ft) 318.33 1.03 Alpha 1.02 2.10 Frctn Loss (ft) 1.04 0.04 C & E Loss (ft) 0.01 0.03 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Cony. (cfs) wetted per. (ft) shear (lb/sq ft) Stream power (lb/ft Cum volume (acre-ft) Cum SA (acres) Page 11 Elev Sta 375 695.92 350 819.29 325 989.76 320 1036.74 32.7 1075.63 340 1129.67 352 1225.19 347.21 1332.66 s) coeff Contr. .1 Left OB 0.100 106.38 18.67 18.67 38.39 12.06 2.06 1. 55 363.5 12.45 1.04 2.15 0.06 0.04 Elev 370 345 320 325 328 345 351 354.3 Expan. .3 channel 0.100 83.70 1896.62 1896.62 12930.11 207.31 6.82 9.15 122409.8 209.52 6.31 42.99 12.83 1. 35 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 4 INPUT Description: cross-section #4 station Elevation Data num= 41 Sta Elev Sta Elev Sta 678.28 400 716.25 390 735.55 782.31 370 801.95 365 816.66 859.68 345 874.58 340 895.96 972.9 320 983.33 319 994.86 1011.51 319 1033.43 320 1047.25 1070.6 326 1075.28 329 1098.95 1129.34 340 1144.92 345 1160.54 1227.4 362 1263.88 362 1282.93 1358.23 355.7 Manning's n values Sta n val Sta num= 3 n val Sta 678.28 .1 908.77 .1 1108.25 Elev Sta 385 753.13 360 831. 54 335 908.77 318 1000 320 1060.67 329 1108.25 350 1182.45 360 1322.33 n val .1 Bank Sta: Left Right 908.77 1108.25 Lengths: Left channel Right 77.73 90.76 77.43 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB Vel Head (ft) 0.100 W.S. Elev (ft) 77 .43 Crit W.S. (ft) 4.25 E.G. slope (ft/ft) 4.25 Q Total (cfs) 6.82 TOP wi dth (ft) 4.42 vel Total (ft/s) 1. 61 Max chl Dpth (ft) 0.96 Conv. Total (cfs) 58.0 Length wtd. (ft) 4.82 Mi n ch El (ft) 0.76 332.77 0.84 331. 92 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) Wetted Per. (ft) shear (1 b/sq ft) Elev Sta 380 767.74 355 843.82 330 940.33 317.44 1005.14 320 1069.44 330 1119.74 355 1209.64 356 1348.43 coeff Contr. . 1 Left OB 0.100 77.73 4.74 4.74 7.68 4.93 1.62 0.96 65.4 5.29 0.77 Alpha 0.013805 13000.00 208.82 7.34 14.48 110643.1 90.75 317.44 1.01 Stream power (1 b/ft s) 1.25 1.22 Page 12 Elev 375 350 325 318 325 335 360 355 Expan . .3 channel 0.100 90.76 1761. 91 1761. 91 12985.50 199.48 7.37 8.83 110519.7 203.14 7.48 55.09 I I I I I I I I I I I I I I I I I I I Frctn Loss (ft) 0.02 C & E Loss (ft) 0.01 SMC_Existing.rep 1.23 Cum volume (acre-ft) 0.01 Cum SA (acres) 0.04 0.02 9.31 0.96 warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 3 INPUT Description: cross-Section #3 Station Elevation Data num= 55 Sta Elev Sta Elev Sta 756.56 400 782 395 797.74 834.12 375 845.86 370 861.01 891.99 350 899.97 345 908.29 949.34 325 968.54 320 981.81 998.51 316 1000 315.9 1001.49 1038.01 319 1054.64 320 1063.98 1081.19 320 1090.94 325 1096.42 1136.48 335 1151.92 340 1184.21 1244.92 366 1265.74 367 1287.71 1322.77 366 1330.54 365 1337.32 1400.02 358 1406.82 357 1410.77 Manning's n values Sta n val Sta num= 3 n val Sta 756.56 .1 929.59 .1 1096.42 El ev Sta 390 809.19 365 871. 59 340 917.99 319 988.18 316 1013.47 320 1074.56 330 1104.95 350 1216.77 368 1290.89 364 1382.59 357 1425.17 n val .1 Bank Sta: Left Right Lengths: Left Channel Right 929.59 1096.42 62.17 102.86 114.21 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 W.S. Elev (ft) 114.21 crit W.S. (ft) 0.37 E.G. slope (ft/ft) 0.37 Q Total (cfs) 0.26 TOp width (ft) 1.26 vel Total (ft/s) 0.71 Max chl Dpth (ft) 0.29 Cony. Total (cfs) 2.3 331. 53 0.94 330.59 0.013230 13000.00 169.45 7.78 14.69 113020.2 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp width Cft) Avg. vel. Cft/s) Hydr. Depth (ft) Cony. Ccfs) Page 13 Elev Sta 385 820.36 360 882.06 335 929.59 318 991. 86 317 1021. 52 319 1076.35 334 1124.08 360 1236.15 368 1309.25 360 1389.89 357 1433.14 coeff Cant r . . 1 Left OB 0.100 62.17 0.40 0.40 0.29 1. 37 0.71 0.29 2.5 Elev 380 355 330 317 318 319 334 365 367 359 358.6 Expan . .3 channel 0.100 102.86 1670.24 1670.24 12999.45 1:66.83 7.78 10.01 113015.4 I I I I I I I I I I I I I I I I I I I Length wtd. (ft) SMC_Existing.rep 102.86 wetted per. (ft) 1.49 171.88 1.39 Min ch El (ft) 315.90 shear (lb/sq ft) 0.22 8.03 0.22 Alpha 1.00 Stream power (lb/ft s) 0.16 62.47 0.16 Frctn LOSS (ft) 1. 72 Cum volume (acre-ft) 0.03 5.73 0.01 C & E Loss (ft) 0.05 Cum SA (acres) 0.02 0.58 0.01 warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos Creek REACH: 1 RS: 2 INPUT Description: Cross-Section #2 station Elevation Data num= 44 Sta Elev Sta Elev Sta 817.95 390 835.8 385 848.86 886.76 365 897.43 360 907.12 937.72 340 945.29 335 955.45 992.43 316 995.62 315 1000 1022.62 317 1040.86 317 1070.99 1095.8 330 1112.35 330 1124.85 1145.49 330 1163.01 335 1179.36 1223 355 1240.82 360 1256.16 1427.66 360 1472.02 358 1477.48 Manning's n values num= 3 Sta n val Sta n val Sta 817.95 .1 955.45 .1 1095.8 Elev Sta 380 861. 86 355 915.7 330 964.03 314.34 1004.39 317 1079.24 329 1132.22 340 1191.6 365 1318.92 357.6 1501.06 n val .1 Bank Sta: Left Right 955.45 1095.8 Lengths: Left Channel Right 181.76 92.2 63.34 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) 329.76 Element Right OB vel Head (ft) 1.48 Wt. n-val. W.S. Elev (ft) 328.27 Reach Len. (ft) 63.34 Crit W.S. (ft) Flow Area (sq ft) E.G. slope (ft/ft) 0.021693 Area (sq ft) Q Total (cfs) 13000.00 Flow (cfs) TOp width (ft) 135.19 TOp width (ft) page 14 El ev Sta 375 874.73 350 925.43 325 974.02 315 1011. 84 320 1089.41 328.33 1142.44 345 1208 369.8 1372.13 358.6 . coeff Cont r . .1 Elev 370 345 320 316 325 329 350 365 Expan. .3 Left OB channel 0.100 181.76 92.20 1329.82 1329.82 13000.00 135.19 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep vel Total (ft/s) 9.78 Avg. Vel. (ft/s) 9.78 Max chl Dpth (ft) 13 .93 Hydr. Depth (ft) 9.84 Cony. Total (cfs) 88263.4 Cony. (cfs) 88263.4 Length wtd. (ft) 92.38 Wetted per. (ft) 140.87 Mi n ch E1 (ft) 314.34 shear (lb/sq ft) 12.79 Alpha 1.00 Stream power (lb/ft s) 124.98 Frctn LOSS (ft) 1.16 Cum volume (acre-ft) 0.03 2.19 0.01 C & E LOSS (ft) 0.31 Cum SA (acres) 0.02 0.22 0.01 warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is 1 ess than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 1 INPUT Description: cross-section #1 Dis (Dr. chang's Cross section #6.047) station Elevation Data num= 35 Sta Elev Sta Elev Sta 879.61 353.9 893.38 350 911.57 948.88 330 957.68 325 968.62 985.29 313 989.11 312 1000 1030.85 314 1034.87 315 1042.44 1060.24 327 1131.57 327 1135.93 1170.78 345 1186.7 350 1204.59 1269.54 369 1349.66 365 1408.31 Manning's n values sta n val Sta num= 3 n val Sta 879.61 .035 968.62 .035 1042.44 E1ev Sta 345 924.79 320 974.88 311. 76 1010.89 320 1054.34 330 1140.53 355 1223.18 360 1458.18 n val .035 Bank Sta: Left Right 968.62 1042.44 Lengths: Left channel Right 000 CROSS SECTION OUTPUT profile #PF#l E.G. E1ev (ft) 328.29 Element Right OB vel Head (ft) 4.58 Wt. n-va1. 0.035 page 15 Elev Sta 340 937.35 315 980.16 312 1025.07 325 1056.34 335 1150.46 360 1239.57 357.21 1480.39 coeff Contr. .1 Left OB 0.035 E1ev 335 314 313 326 340 365 358.65 Expan. .3 channel 0.035 I I I I I I I I I I I I I I I I I I I W.S. Elev (ft) SMC_Existing.rep 323.71 Reach Len. (ft) crit W.S. (ft) 323.71 Flow Area (sq ft) 15.05 742.26 16.37 E.G. slope (ft/ft) 0.008168 Area (sq ft) 15.05 742.26 16.37 Q Total (cfs) 13000.00 Flow (cfs) 81.80 12828.42 89.78 TOp Width (ft) 90.76 TOP Width (ft) 8.11 73.82 8.83 vel Total (ft/s) 16.80 Avg. vel. (ft/s) 5.44 17.28 5.49 Max chl Dpth (ft) 11.95 Hydr. Depth (ft) 1.85 10.06 1.85 Conv. Total (cfs) 143845.6 Conv. (cfs) 905.1 141947.0 993.5 Length Wtd. (ft) Wetted per. (ft) 8.92 77.64 9.57 Min ch El (ft) 311. 76 shear (lb/sq ft) 0.86 4.87 0.87 Alpha 1.05 Stream Power (lb/ft s) 4.67 84.25 4.78 Frctn Loss (ft) Cum volume (acre-ft) C & E Loss (ft) Cum SA (acres) warning: slope too steep for slope area to converge during supercritical flow calculations (normal depth is below critical depth). Water surface set to critical depth. SUMMARY OF MANNING'S N VALUES River:san Marcos creek Reach River Sta. n1 n2 n3 1 11 .1 .1 .1 1 10.5 Bridge 1 10 .1 .1 .1 1 9 .1 .1 .1 1 8 .1 .1 .1 1 7 .1 .1 .1 1 6 .1 .1 .1 1 5 .1 .1 .1 1 4 .1 .1 .1 1 3 .1 .1 .1 1 2 .1 .1 .1 1 1 .035 .035 .035 SUMMARY OF REACH LENGTHS River: San Marcos creek Reach River Sta. Left Channel Right Page 16 I I I I I I I I I I I I I I I I I I I SMC_Existing.rep 1 11 219 219 219 1 10.5 Bridge 1 10 198 120.5 71.1 1 9 75 81.4 35 1 8 111.43 120.3 120 1 7 73.52 100.15 106.36 1 6 84.54 84.95 104.32 1 5 106.38 83.7 84.95 1 4 77.73 90.76 77 .43 1 3 62.17 102.86 114.21 1 2 181.76 92.2 63.34 1 1 0 0 0 SUMMARY OF CONTRACTION AND EXPANSION COEFFICIENTS River: San Marcos creek Reach River Sta. Contr. Expan. 1 11 .1 .3 1 10.5 Bridge 1 10 .1 .3 1 9 .1 .3 1 8 .1 .3 1 7 .1 .3 1 6 .1 .3 1 5 .1 .3 1 4 .1 .3 1 3 .1 .3 1 2 .1 .3 1 1 .1 .3 profile output Table -standard Table 1 Reach River Sta profile Q Total Mi n ch El W.S. Elev crit W.S. E.G. Elev E.G. slope vel chnl Flow Area TOp Width Froude # chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) 1 11 PF#l 13000.00 323.50 338.41 332.22 338.86 0.007506 5.42 2410.28 289.09 0.32 1 10.5 Bri dge 1 10 PF#l 13000.00 321. 50 337.02 337.24 0.002363 3.79 3520.51 324.89 0.19 1 9 PF#l 13000.00 320.50 336.25 336.78 0.006172 5.91 2368.25 288.82 0.31 1 8 PF#l 13000.00 320.40 335.88 336.27 0.005562 5.18 2667.88 544.13 0.29 1 7 PF#l 13000.00 319.72 335.08 335.52 0.007030 5.96 2660.80 390.63 0.32 1 6 PF#l 13000.00 318.60 334.08 334.69 0.009309 6.32 2136.27 271.72 0.36 1 5 PF#l 13000.00 318.33 333.10 333.81 0.011158 6.82 1930.75 229.36 0.40 1 4 PF#l 13000.00 317.44 331. 92 332.77 0.013805 7.37 1770.89 208.82 0.44 page 17 I I I I I I I I I I I I I I I I I I I 1 1 1 331. 53 329.76 328.29 3 0.013230 2 0.021693 1 0.008168 SMC_Existing.rep PF#l 13000.00 7.78 1671. 01 PF#l 13000.00 9.78 1329.82 PF#l 13000.00 17.28 773.68 page 18 315.90 330.59 169.45 0.43 314.34 328.27 135.19 0.55 311. 76 323.71 323.71 90.76 0.96 I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 4 DEVELOPED CONDITIONS HEC-RAS RESULTS DE:de h:lreports'17S1'136Uomr\Jom,-01.doc w.o.17S1-136 9f10f200910:06AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 4.1 DEVELOPED SUMMARY TABLE DE:de h:\reports\17511136~omr\lom,-01.doc w.o.1751.136 9/10/200910:06 AM -- - ----- - -- -- - - ----' HEC-RAS Plan: Dev-Normal River: San Marcos Creek Reach: 1 Profile: PF#1 Reach" Rivef~t~, ' , Profile,',', ,a:f;gtaL,_ ' Mif.l,<;:b'~1 , ' 'w,': i3 .:E!Er~i ~' , '~rit\Wi"S. , is,Gi ll;O!!~Y: , '~:,Gjq!qpC? ,,' , :Y~I¢tml .. FI9W~re~, ' , T9P Y'Ji4th rrqude # Chi I : (~fs)' " ",(tt),', '(fO, ' ' ';'{j't):, ,;,: ;' ;(11Ift); , , '(Wsj, -" ',(sq,;fj:) (tt) , , ,(ft), .. 1 11: ' PFtt1 13000.00 323.50 ' 338.41 332.22 338.87 0.007496 5.42 2411.34 289.12 0.32 1 '10:5, .. Bridge 1 10 fF#1 13000.00 321.50 337.03 337.25 0.002359 3.79 3522.49 324.93 0.19 1 9 ' Pi=#1 13000.00 320.50 336.26 336.78 0.006156 5.91 2370.47 288.90 0.31 1 8 PF~1 13000.00 320.40 335.89 336.28 0.005544 5.18 2670.78 544.46 0.29 1 7 PF#1 13000.00 319.72 335.08 335.53 0.007115 5.99 2661.59 398.53 0.32 1 6 PF#1 13000.00 318.60 334.08 334.69 0.009309 6.32 2136.27 271.72 0.36 1 5 PF#1 13000.00 318.33 333.10 333.81 0.011158 6.82 1930.75 229.36 0.40 1 4 PF#1 13000.00 317.44 331.92 332.77 0.013805 7.37 1770.89 208.82 0.44 1 3 PF#1 13000.00 315.90 330.59 331.53 0.013230 7.78 1671.01 169.45 0.43 1 2 PF#1 13000.00 314.34 328.27 329.76 0.021693 9.78 1329.82 135.19 0.55 1 1 PF#1 13000.00 311.76 323.71 323.71 328.29 ~Q~ -17.28 773.68 90.76 0,96 -------- I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 4.1.1 CHANNEL CROSS SECTIONS DE de h:\reportsI17S1I136UomrUomr;..01.doc w.o.17S1-136 9/10/200910:06 AM -- g c 0 ~ > Q) ill g c: g ro > Q) ill - ----- -- San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 11 350 .1+ .1 +.11 345 340 335 330 325 320. I I I I I I I I 850 900 950 1000 1050 1100 1150 1200 1250 Station (ft) Legend WS PF#1 Crit PF#1 • Ground <& Bank Sta San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 355 350 345 340 335 330 325 320 700 River = San Marcos Creek Reach = 1 RS = 10.5 BR r-.1-+ .1 + .11 800 900 j'< ~~ ~ 1 ~ i, },,1!I' ~>-'l • ", , ~,1 :j.:~ 1000 Station (ft) ;,,' I,. ~ ;;~' .,,"' ~',: : i ::~: (-: l! '" 1100 1200 Legend i WS PF#1 ,+ Crit PF#1 • Ground (I) Bank Sta g c: o 'iii > Q) ill g c: 0 ~ > Q) ill -- ---- San Marcos Creek-Developed Plan: Dev-Normal-Depth River = San Marcos Creek Reach = 1 RS = 10.5 355~ ~.1+ .1 +.11 350 345 340 335 330 325- - 3/5/2007 BR - Legend WS PF#1 Crit PF#1 Ground @ Bank Sta 3201 I I I I I • I I I I 850 900 950 1000 1050 1100 1150 1200 1250 Station (ft) San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 10 Cross Section #10 350 345 340 335 330 325 320 700 800 .1-+ .1 +.11 900 1000 1100 1200 Station (ft) Legend WS PF#1 Ground Q Bank Sta - -- g c 0 :p ro > Q) iIi g c .Q iii > .!Q w -- --- --- -- - -- -- - San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 9 Cross section #9 370 .1 )i( .1 )i( .1 ---1 360 350 340 330 320 I i T'7 700 800 900 1000 Station (ft) 1100 1200 1300 Legend WS PF#1 Ground • Bank Sta San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 7 Cross-Section #7 380 .1-+-.1+-.1 1 370 360 350 340 330 320 310 I I I I I I I I I Legend WS PF#1 Ground e Bank Sta 600 700 800 900 1000 1100 1200 1300 1400 Station (ft) San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 8 Cross section #8 370 360 g 350 c o Til > ITl 340 330 .1-+-.1~.1 )1 320 I T i 600 800 1000 1200 1400 Station (ft) 1600 Legend WS PF#1 Ground -A.- Ineff I!> Bank Sta San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 6 Cross-Section #6 400 380 g 360 § ~ .!Q 340 w 320 I( .1 + .1-+-.1~ 300~1-..-~-.~~-..-~-..-~~.-~~.-"" 400 600 800 1000 1200 1400 Station (ft) Legend WS PF#1 Ground " Bank Sta - - - g c 0 "" <Il > <1l iIi g c 0 ~ > <1l iIi -,---- --'------ --- San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 5 Cross-Section #5 400 I( .1-+-.1 + .1-1 380 360 340 320 300-" 'I' 'I' 'I' 'I' 'I 400 600 800 1000 1200 1400 Station (ft) Legend WS PF#1 -Ground I» Bank Sta San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 3 Cross-Section #3 +-.1 + .1 )1 .1 400 380 360 340 320 300 I I I I I I I I I 700 800 900 1000 1100 1200 1300 1400 1500 Station (ft) Legend WS PF#1 Ground " Bank Sta San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 4 Cross-Section #4 ~.1 )I( .1--1 .1 400 Legend WS PF#1 380 g 360 Ground i) Bank Sta c o ~ ~ 340 w g c o ~ iIi 320 300 I I I I I I I I I 600 700 800 900 1000 1100 1200 1300 1400 Station (ft) San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 2 Cross-Section #2 L.1~.1 )1< .1 )1 400-r-.. --~ " i\ 380 360 340 320 300 800 900 1000 1100 1200 1300 1400 1500 Station (ft) 1600 Legend WS PF#1 Ground Q) Bank Sta - -- g c 0 ~ > Q) W - ---- -- - San Marcos Creek-Developed Plan: Dev-Normal-Depth 3/5/2007 River = San Marcos Creek Reach = 1 RS = 1 Cross·Section #1 DIS (Dr. Chang's Cross Section #6.047) 370 r .035 +-035+ .035 , 360 350 340 330 320 310~1~,~~~~~rr"~~~rr~~~~~rr~,, 800 900 1000 1100 1200 1300 1400 1500 Station (tt) Legend WS PF#1 Crit PF#1 Ground o Bank Sta ------.. -- I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 4.1.2 CHANNEL PROFILE DE·de h.\reports\17511136~omr~om,-01.doc w.o.17S1-136 91101200910:06AM I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 4.1.3 DEVELOPED CONDITION HEC-RAS REPORT DE:de h.\reports\1751\136~omr~omr~01.doc w.o.1751-136 9i10J200910:06AM I I I I I I I I I I I I I I I I I -I I .' SMC_Deve loped. rep HEC-RAS version 3.1.3 May 2005 U.S. Army corp of Engineers Hydrologic Engineering Center 609.second Street Davis, california x X XXXXXX XXXX XXXX XX X X X X X X X X X XXXXXXX XXXX X XXX X X X X X X X X X X X XXXXXX XXXX PROJECT DATA project Title: San Marcos creek-Developed project File : sMc_Developed.prj Run Date and Time: 3/5/2007 5:04:04 PM project in English units project Description: San Marcos creek Floodplain Analysis PLAN DATA X X X X X X X X XXXX XXXXXX X X X X X X X X X X X X XXXX X X XXXX X X XXXXX plan Title: Dev-Normal-Depth Plan File: C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\sMC_Developed.p04 Geometry Title: Developed Conditions Geometry File : c:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\sMC_Developed.g03 Flow Title : Dev-Normal Depth Flow File : C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMc_Developed.f03 plan summary Information: Number of: Cross sections culverts = Bridges = 11 o 1 Multiple openings = Inline Structures = Lateral Structures computational Information Water surface calculation tolerance = critical depth calculation tolerance Maximum number of iterations = 0.01 0.01 20 0.3 0.001 Maximum difference tolerance = Flow tolerance factor computation options critical depth computed only where necessary conveyance calculation Method: At breaks in n values only Friction slope Method: Average conveyance computational Flow Regime: Mixed Flow Page 1 o o o I I I I I I I I I I I I I I I I I I I SMC_Developed.rep FLOW DATA Flow Title: Dev-Normal Depth Flow File : C:\Documents and Settings\dedwards\Desktop\san Marcos creek rev-2-24-03\sMc_Developed.f03 Flow Data Ccfs) River Reach San Marcos creek1 San Marcos creek1 Boundary conditions River Downstream Reach san Marcos Creek1 Normal S = 0.028 GEOMETRY DATA RS 11 7 profile PF#l Geometry Title: Developed conditions PF#l 13000 13000 Upstream criti cal Geometry File : C:\Documents and settings\dedwards\Desktop\san Marcos creek rev-2-24-03\SMC_Developed.g03 CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 11 INPUT Description: station Elevation Data num= 31 Sta Elev sta Elev Sta Elev sta Elev Sta 856 350 862 348 867.1 346 872.7 344 880.2 886.5 340 893.7 338 899 336 905.9 334 913.7 918.4 330 936.1 329 949.9 328 964.1 327 975.3 1000 324 1013.7 323.5 1030 324 1052.9 326 1062.2 1071. 5 328 1076.5 329 1080.3 330 1083.7 332 1087 1173 336 1179.8 338 1187.3 340 1195 342 1202.4 1210.5 346 Manning's n values num= 3 Sta n val Sta n val Sta n val 856 .1 899 .1 1173 .1 Elev 342 332 326 327 334 344 Bank Sta: Left Right Lengths: Left channel Right coeff Contr. Expan. 899 1173 219 219 219 .1 .3 CROSS SECTION OUTPUT profile #PF#l page 2 I I I I I I I I I I I I I I I I I I I I SMc_Developed.rep E.G. Elev (ft) 338.87 Element Left OB channel Right OB vel Head (ft) 0.46 wt. n-val. 0.100 0.100 0.100 W.S. Elev (ft) 338.41 Reach Len. (ft) 0.10 0.10 0.10 crit W.S. (ft) 332.22 Flow Area (sq ft) 7.78 2393.65 9.91 E.G. slope (ft/ft) 0.007496 Area (sq ft) 7.78 2393.65 9.91 Q Total (cfs) 13000.00 Flow (cfs) 10.54 12975.53 13.93 TOP Width (ft) 289.12 TOp Width (ft) 6.78 274.00 8.34 vel Total (ft/s) 5.39 Avg. vel. (ft/s) 1. 35 5.42 1.41 Max chl Dpth (ft) 14.91 Hydr. Depth (ft) 1.15 8.74 1.19 Cony. Total (cfs) 150154.4 Cony. (cfs) 121.8 149871. 8 160.9 Length wtd. (ft) 0.10 wetted Per. (ft) 7.20 276.74 8.68 Mi n ch El (ft) 323.50 shear (lb/sq ft) 0.51 4.05 0.53 Alpha 1.01 Stream power (lb/ft s) 0.69 21. 94 0.75 Frctn Loss (ft) 0.00 Cum volume (acre-ft) 0.83 50.48 5.73 c & E LOSS (ft) 0.02 cum SA (acres) 0.31 4.96 1. 53 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. BRIDGE RIVER: San Marcos creek REACH: 1 RS: 10.5 INPUT Description: Distance from upstream XS = .1 Deck/Roadway Width 200 weir coefficient = 2.6 upstream Deck/Roadway coordinates num= 2 Sta Hi cord Lo cord Sta Hi cord Lo cord o 355 350 1202.4 349 344 upstream Bridge Cross Section Data Station Elevation Data num= 31 Sta Elev Sta Elev Sta Elev 856 350 862 348 867.1 346 886.5 340 893.7 338 899 336 918.4 330 936.1 329 949.9 328 1000 324 1013.7 323.5 1030 324 page 3 Sta Elev Sta Elev 872.7 344 880.2 342 905.9 334 913.7 332 964.1 327 975.3 326 1052.9 326 1062.2 327 I I: I I I I I I I I I· I I. I I I I I I sMC_Developed.rep 1071.5 328 1076.5 329 1080.3 330 1083.7 1173 336 1179.8 338 1187.3 340 1195 1210.5 346 Manning's n values num= 3 Sta n val Sta n val Sta n val 856 .1 899 .1 1173 .1 Bank Sta: Left Right coeff Contr. Expan . 899 1173 . 1 .3 Downstream Deck/Roadway coordinates num= 2 Sta Hi cord Lo cord Sta Hi Cord Lo cord 0 355 350 1191. 8 349 344 Downstream Bridge Cross section Data station Elevation Data num= 29 Sta Elev Sta Elev Sta Elev Sta 799.3 350 806.4 348 812.5 346 818.9 831.5 340 837.6 338 843.9 336 850.3 862.5 330 885.5 330 899.3 329 904 951.9 323 971 322 1000 321. 5 1033.1 1078.5 324 1140.6 330 1147.6 332 1155.2 1169.3 338 1177 340 1184.5 342 1191. 8 Manning's n Values num= 3 Sta n val sta n val Sta n val 799.3 .1 862.5 .1 1140.6 .1 Bank Sta: Left Right coeff Cont r . Expan. 862.5 1140.6 .1 .3 upstream Embankment side slope = 0 hori z. Downstream Embankment side slope = 0 hori z. Maximum allowable submergence for weir flow = .95 Elevation at which weir flow begins = Energy head used in spillway design = spillway height used in design = weir crest shape = Broad crested Number of Piers = 2 Pier Data pier station upstream= 961. 7 Downstream= 957.4 upstream num= 2 Width Elev width Elev 15 326 15 350 Downstream num= 2 width El ev Width Elev 15 327 15 350 pier Data Pier station upstream= 1059.7 Downstream= 1059.1 upstream num= 2 Width Elev width Elev 15 323 15 350 Downstream num= 2 width Elev width Elev 15 329 15 350 Number of Bridge coefficient Sets = 1 page 4 332 1087 334 342 1202.4 344 Elev Sta Elev 344 825.3 342 334 85.6.5 332 328 910.9 327 322 1064.7 323 334 1161.7 336 344 to 1. 0 verti cal to 1. 0 verti cal I I I I I I I I I I I I I I I I' I I I SMC_Developed.rep Low Flow Methods and Data Energy selected Low Flow Methods = High Flow Method Energy only Highest Energy Answer Additional Bridge parameters Add Friction component to Momentum Do not add weight component to Momentum class B flow critical depth computations use critical depth inside the bridge at the upstream end criteria to check for pressure flow = upstream energy grade line BRIDGE OUTPUT profile #PF#l E.G. us. (ft) 338.87 Inside BR DS W.S. us. (ft) 338.41 337.32 Q Total (cfs) 13000.00 337.04 Q Bridge (cfs) 13000.00 329.27 Q wei r (cfs) 15.54 weir sta Lft (ft) 4.20 weir Sta Rgt (ft) 3098.92 weir submerg 0.22 weir Max Depth (ft) 20604.27 Min El Weir Flow (ft) 349.01 10.50 Min El Prs (ft) 345.67 354.77 Delta EG (ft) 1.62 202400.6 Delta WS (ft) 1.38 295.03 BR open Area (sq ft) 3874.77 0.06 BR open vel (ft/s) 6.47 0.02 coef of Q 2.25 Br sel Method Energy only 9.44 Element Inside BR us E.G. Elev (ft) 338.85 w.s. Elev (ft) 338.19 crit w.s. (ft) 332.98 Max chl Dpth (ft) 14.69 vel Total (ft/s) 6.47 Flow Area (sq ft) 2010.35 Froude # chl 0.40 specif Force (cu ft) 13299.57 Hydr Depth (ft) 7.81 W.P. Total (ft) 305.85 Conv. Total (cfs) 107113.1 TOp width (ft) 257.50 Frctn Loss (ft) 1.41 C & E Loss (ft) 0.11 shear Total (lb/sq ft) 6.04 Power Total (lb/ft s) 39.09 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION page 5 I I I' I I I I I I I I I I I I I I I I RIVER: San Marcos creek REACH: 1 RS: 10 INPUT Description: Cross section #10 station Elevation Data num= Sta Elev Sta Elev 799.3 350 806.4 348 831.5 340 837.6 338 862.5 330 885.5 330 951.9 323 971 322 1078.5 324 1140.6 330 1169.3 338 1177 340 SMC_Developed.rep 29 Sta 812.5 843.9 899.3 1000 1147.6 1184.5 Elev 346 336 329 321. 5 332 342 Sta 818.9 850.3 904 1033.1 1155.2 1191. 8 Manning's n values num= 3 Sta n val Sta 799.3 .1 862. 5 n val Sta .1 1140.6 n val .1 Bank Sta: Left Right Lengths: Left channel Right 71.1 862.5 1140.6 198 120.5 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 w.s. Elev (ft) 71.10 crit W.S. (ft) 87.96 E.G. slope (ft/ft) 87.96 Q Total (cfs) 143.14 TOp Width (ft) 25.00 vel Total (ft/s) 1. 63 Max chl Dpth (ft) 3.52 Conv. Total (cfs) 2947.3 Length wtd. (ft) 25.97 Min ch El (ft) 0.50 Alpha 0.81 Frctn Loss (ft) 5.47 c & E Loss (ft) 1.44 337.25 0.22 337.03 0.002359 13000.00 324.93 3.69 15.53 267673.8 120.06 321. 50 1.04 0.43 0.03 Element Wt. n-Val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted Per. (ft) shear (lb/sq ft) Stream Power (lb/ft s) Cum volume (acre-ft) Cum SA (acres) Elev Sta 344 825.3 334 856.5 328 910.9 322 1064.7 334 1161. 7 344 coeff Contr. .1 Elev 342 332 327 323 336 Expan. .3 Left OB channel 0.100 0.100 198.00 120.50 75.75 3358.78 75.75 3358.78 121.23 12735.63 21. 83 278.10 1. 60 3.79 3.47 12.08 2~96.1 262230.3 22.94 278.88 0.49 1. 77 0.78 6.72 0.61 37.79 0.23 3.72 warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. Page 6 I I I I I I I I I' I I I I I I I I I, I SMC_Developed.rep CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 9 INPUT Description: Cross section #9 station Elevation Data num= Sta Elev Sta Elev 798.7 370 845.7 360 984.7 322 995.5 321 1039.9 323 1119 330 1222 338 1266.2 340 Manning's n Values num= Sta n val Sta n val 798.7 .1 935.5 .1 Bank sta: Left Right Lengths: 935.5 1119 17 Sta 875.6 1000 1135.3 3 Sta 1119 Elev Sta 350 911 320.5 1022.2 332 1155.7 n val .1 Left Channel Right 75 81.4 35 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) 336.78 Right OB vel Head (ft) 0.52 0.100 W.S. Elev (ft) 336.26 35.00 crit W.S. (ft) 217.48 E.G. slope (ft/ft) 0.006156 217.48 Q Total (cfs) 13000.00 455.49 TOp Width (ft) 288.90 90.06 vel Total (ft/s) 5.48 2.09 Max chl Dpth (ft) 15.76 2.41 Cony. Total (cfs) 165683.0 5805.1 Length wtd. (ft) 79.39 90.33 Min ch El (ft) 320.50 0.93 Alpha 1.12 1.94 Frctn Loss (ft) 0.46 5.22 C & E Loss (ft) 0.04 1. 35 CROSS SECTION RIVER: San Marcos Creek Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Cony. (cfs) wetted Per. (ft) shear (l b/sq ft) Stream power (lb/ft s) cum volume (acre-ft) Cum SA (acres) page 7 Elev Sta 340 935.5 321 1032.8 334 1207.1 coeff Contr. .1 Left OB 0.100 75.00 48.04 48.04 113.88 15.34 2.37 3.13 1451. 4 16.57 1.11 2.64 0.32 0.15 Elev 330 322 336 Expan. .3 Channel 0.100 81.40 2104.95 2104.95 12430.63 183.50 5.91 11.47 158426.4 184.65 4.38 25.87 30.23 3.08 I I I I I I I I I I I I I I I I I I I SM~Developed.rep REACH: 1 INPUT RS: 8 Description: Cross section #8 station Elevation Data num= Sta Elev sta Elev 785.4 370 838.2 360 992.3 321 1000 320.4 1180.3 331 1187.9 332 1228.6 336 1234.9 337 1274.7 339 1280.6 338 1301.9 334 1320.1 333 1391.1 329 1431.5 329 1451.3 333 1460.2 334 1488.9 337 1490.1 336 1519.5 334 1522 335 1540.8 339 1544.3 340 Manning's n values Sta n val sta 785.4 .1 926.6 num= n val .1 52 Sta 868 1010.8 1201 1242.3 1286.7 1356.6 1435.3 1464 1491.9 1524 3 Sta 1159 Elev 350 321 333 338 337 332 330 335 335 336 n val .1 Bank Sta: Left Right 926.6 1159 Ineffective Flow num= Lengths: Left channel 111.43 120.3 1 Sta L Sta R Elev permanent 1269.7 1544.3 F Sta 891.2 1061. 9 1221. 8 1248.2 1293.4 1380.4 1441.3 1484.9 1493.5 1526.6 Right 120 CROSS SECTION OUTPUT profile #PF#l E . G . El ev (ft) Right OB vel Head (ft) 0.100 W.S. Elev (ft) 120.00 Crit W.S. (ft) 247.57 E.G. slope (ft/ft) 1067.90 Q Total (cfs) 638.33 TOp Width (ft) 291. 23 vel Total (ft/s) 2.58 Max chl Dpth (ft) 3.58 Cony. Total (cfs) 8573.4 Length wtd. (ft) 69.58 Min ch El (ft) 1.23 Alpha 3.17 Frctn Loss (ft) 4.70 C & E Loss (ft) 1.19 336.28 0.40 335.89 0.005544 13000.00 544.46 4.87 15.49 174601. 8 120.20 320.40 1.08 0.75 0.00 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted per. (ft) shear (lb/sq ft) stream Power (lb/ft s) cum volume (acre-ft) Cum SA (acres) Page 8 Elev 340 326 334 339 336 331 331 336 334 337 Sta 926.6 1159 1224.7 1267.9 1297.8 J.385.9 1447.5 1486.2 1509.8 1530.8 Elev 330 330 335 340 335 330 332 337 333 338 coeff Contr. .1 Expan. .3 Left OB channel 0.100 0.100 111.43 120.30 61. 32 2361. 89 61. 32 2361. 89 135.79 12225.88 20.84 232.40 2.21 5.18 2.94 10.16 1823.7 164204.7 21. 65 233.38 0.98 3.50 2.17 18.13 0.23 26.06 0.12 2.69 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep warning: Divided flow computed for this cross-section. CROSS SECTION RIVER: san Marcos creek REACH: 1 RS: 7 INPUT Description: cross-Section #7 Station Elevation Data num= 42 Sta Elev Sta Elev Sta Elev Sta 690.83 380 700.99 379 708.72 378 715.2 734.77 375 746.46 374 751. 91 373 759.89 786.63 370 810.33 365 825.61 360 834.47 860.33 345 877.96 340 896.84 335 912.77 976.57 321 991.2 320 1000 319.72 1008.84 1040.6 326 1084.17 327 1117.93 328 1123.73 1157.38 331 1181.4 332 1251. 87 333 1283.74 1295.07 335 1295.07 338 1296.09 338 1303.72 1316.83 347 1322.93 347 Manning's n values num= 3 Sta n val Sta n val Sta n val .1 690.83 .1 896.84 .1 1040.6 Bank Sta: Left Right Lengths: Left channel Right 896.84 1040.6 73.52 100.15 106.36 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) 335.53 Right OB vel Head (ft) 0.45 0.100 W.S. Elev (ft) 335.08 106.36 crit W.S. (ft) 1135.09 E.G. slope (ft/ft) 0.007115 1135.09 Q Total (cfs) 13000.00 3851.44 TOP width (ft) 398.53 254.47 vel Total (ft/s) 4.88 3.39 Max chl Dpth (ft) 15.36 4.46 Cony. Total (cfs) 154123.4 45661. 3 Length wtd. (ft) 101.04 254.82 Min ch El (ft) 319.72 1.98 Alpha 1.20 6.71 Frctn LOSS (ft) 0.82 1. 67 C & E Loss (ft) 0.02 0.44 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted per. (ft) shear (lb/sq ft) Stream power (lb/ft s) Cum volume (acre-ft) Cum SA (acres) page 9 Elev Sta Elev 377 725.82 376 372 774.04 371 355 844.96 350 330 940.14 325 320 1026.08 325 329 1133.52 330 335 1285.16 335 340 1313.79 345 coeff Contr. Expan. .1 .3 Left OB channel 0.100 0.100 73.52 100.15 0·.01 1526.49 0.01 1526.49 0.00 9148.56 0.30 143.76 0.14 5.99 0.04 10.62 0.0 108462.1 0.31 145.99 0.02 4.64 0.00 27.83 0.15 20.69 0.09 2.17 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 6 INPUT Description: Cross-section #6 station Elevation Data num= 51 Sta Elev Sta Elev Sta 494.93 400 575.47 390 646.09 717.87 372 729.09 371 743.03 821.87 355 835.98 350 851.78 908.58 330 946.47 325 978.84 1008.06 319 1017.19 320 1033.51 1089.48 327 1099.19 327 1104.43 1136.33 331 1148.98 332 1155.99 1173.87 336 1217.5 336 1240.48 1258.48 337 1259.35 337 1276.22 1283.19 337 1283.19 340 1284.24 1305.12 345 Manning's n Values num= 3 Sta n val Sta n val Sta 494.93 .1 908.58 .1 1123.14 Elev Sta 380 691.53 370 782.6 345 869.91 320 998.26 325 1050.43 328 1109.3 333 1161.47 336 1243.21 337 1278.89 340 1295.14 n val .1 Bank Sta: Left Right 908.58 1123.14 Lengths: Left Channel Right 84.54 84.95 104.32 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) 0.100 w.s. Elev (ft) 104.32 cri t W. S. (ft) 94.28 E.G. slope (ft/ft) 94.28 Q Total (cfs) 243.76 TOp width (ft) 38.68 vel Total (ft/s) 2.59 Max chl Dpth (ft) 2.44 Cony. Total (cfs) 2526.5 Length wtd. (ft) 38.93 Min ch El (ft) 1.41 334.69 0.61 334.08 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Cony. (cfs) Wetted per. (ft) shear (lb/sq ft) Elev Sta 374 703.41 365 805.03 340 885.95 319 1000 326 1068.05 329 1123.14 334 1165.61 336 1248.98 334.5 1281.16 343 1301.19 coeff Cant r . .1 Left OB 0.100 84.54 37.74 37.74 85.72 18.48 2.27 2.04 888.5 18.93 1.16 Alpha 0.009309 13000.00 271. 72 6.09 15.48 134739.2 85.15 318.60 1.06 0.87 Stream Power (lb/ft s) 2.63 3.64 Frctn Loss (ft) 0.17 Cum volume page 10 (acre-ft) 0.12 Elev 373 360 335 318.6 327 330 335 336 337 343 Expan. .3 channel 0.100 > 84.95 2004.24 2004.24 12Q70.52 214.56 6.32 9.34 131324.3 216.45 5.38 34.02 .16.63 I I I I I I I I I I I I I I I I I I I C & E Loss (ft) 0.09 SMC_Developed.rep 0.01 Cum SA (acres) CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 5 INPUT Description: cross-section #5 Station Elevation Data num= 40 Sta Elev Sta Elev sta 556.43 400 621.34 390 661.36 712.94 365 731.07 360 764.68 834.73 340 854.24 335 873.72 994.55 319 1000 318.33 1010.91 1042.53 326 1049.61 327 1065.12 1077.18 329 1081.03 330 1097.16 1153.06 350 1164.99 351 1175.25 1247.54 350 1259.68 349 1274.6 Manning's n values Sta n val Sta num= 3 n val Sta 556.43 .1 873.72 .1 1081. 03 Elev Sta 380 678.15 355 791. 66 330 913.94 319 1018.9 327 1073.66 335 1111. 87 352 1209.45 348 1305.63 n val .1 Bank Sta: Left Right 873.72 1081. 03 Lengths: Left Channel Right 106.38 83.7 84.95 CROSS SECTION OUTPUT profile #PF#l E.G. Elev (ft) 333.81 Right OB vel Head (ft) 0.72 0.100 W.S. Elev (ft) 333.10 84.95 crit W.S. (ft) 15.46 E.G. slope (ft/ft) 0.011158 15.46 Q Total (cfs) 13000.00 31. 50 TOP Width (ft) 229.36 9.99 vel Total (ft/s) 6.73 2.04 Max chl Dpth (ft) 14.77 1. 55 Conv. Total (cfs) 123071.4 298.2 Length wtd. (ft) 83.74 10.46 Min ch El (ft) 318.33 1.03 Alpha 1.02 2.10 Frctn LOSS (ft) 1.04 0.04 C & E Loss (ft) 0.01 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) wetted per. (ft) shear (lb/sq ft) Stream power (lb/ft Cum volume (acre-ft) Cum SA (acres) page 11 0.07 Elev sta 375 695.92 350 819.29 325 989.76 320 1036.74 327 1075.63 340 1129.67 352 1225.19 347.21 i332.66 s) coeff Cont r . .1 Left OB 0.100 106.38 18.67 18.67 38.39 12.06 2.06 1. 55 363.5 12.45 1.04 2.15 0.06 0.04 1. 76 Elev 370 345 320 325 328 345 351 354.3 Expan. .3 Channel 0.100 83".70 1896.62 1896.62 12930.11 207.31 6.82 9.15 122409.8 209.52 6.31 42.99 12.83 1. 35 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep 0.03 warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos Creek REACH: 1 RS: 4 INPUT Description: cross-section #4 Station Elevation Data num= 41 Sta Elev Sta Elev Sta 678.28 400 716.25 390 735.55 782.31 370 801.95 365 816.66 859.68 345 874.58 340 895.96 972.9 320 983.33 319 994.86 1011.51 319 1033.43 320 1047.25 1070.6 326 1075.28 329 1098.95 1129.34 340 1144.92 345 1160.54 1227.4 362 1263.88 362 1282.93 1358.23 355.7 Manning's n Values Sta n Val Sta num= 3 n Val Sta 678.28 .1 908.77 .1 1108.25 Elev Sta 385 753.13 360 831.54 335 908.77 318 1000 320 1060.67 329 1108.25 350 1182.45 360 1322.33 n val .1 Bank Sta: Left Right 908.77 1108.25 Lengths: Left channel Right 77.73 90.76 77.43 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) 332.77 Right OB vel Head (ft) 0.84 0.100 w.s. Elev (ft) 331.92 77 .43 crit w.s. (ft) 4.25 E.G. slope (ft/ft) 0.013805 4.25 Q Total (cfs) 13000.00 6.82 TOp width (ft) 208.82 4.42 vel Total {ft/s) 7.34 1. 61 Max chl Dpth (ft) 14.48 0.96 Cony. Total (cfs) 110643.1 58.0 Length wtd. (ft) 90.75 4.82 Min ch El (ft) 317.44 0.76 Alpha 1.01 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Cony. (cfs) wetted per. (ft) shear (lb/sq ft) Stream Power (lb/ft Page 12 Elev Sta 380 767.74 355 843.82 330 940.33 317.44 1005.14 320 1069.44 330 1119.74 355 1209.64 356 1348.43 s) coeff Cont r . .1 Left OB 0.100 77.73 4.74 4.74 7.68 4.93 1.62 0.96 65.4 5.29 0.77 1.25 Elev 375 350 325 318 325 335 360 355 Expan. .3 channel 0.100 90.76 1761. 91 1761. 91 12985.50 199.48 7.37 8.83 110519.7 203.14 7.48 55.09 I I I I I I I I I I I I I I I I I I I SMC_Deve10ped.rep 1.22 Frctn Loss (ft) 1.23 Cum volume (acre-ft) 0.04 9.31 0.02 C & E Loss (ft) 0.01 Cum SA (acres) 0.02 0.96 0.01 warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos Creek REACH: 1 RS: 3 INPUT Description: cross-Section #3 Station Elevation Data Sta E1ev Sta 756.56 400 782 834.12 375 845.86 891.99 350 899.97 949.34 325 968.54 998.51 316 1000 1038.01 319 1054.64 1081.19 320 1090.94 1136.48 335 1151. 92 1244.92 366 1265.74 1322.77 366 1330.54 1400.02 358 1406.82 Manning's n Values Sta n val Sta 756.56 .1 929.59 num= 55 E1ev Sta 395 797.74 370 861.01 345 908.29 320 981. 81 315.9 1001. 49 320 1063.98 325 1096.42 340 1184.21 367 1287.71 365 1337.32 357 1410.77 num= 3 n val Sta .1 1096.42 E1ev Sta 390 809.19 365 871. 59 340 917.99 319 988.18 316 1013 .47 320 1074.56 330 1104.95 350 1216.77 368 1290.89 364 1382.59 357 1425.17 n val .1 Bank Sta: Left Right Lengths: Left Channel Right 929.59 1096.42 62.17 102.86 114.21 CROSS SECTION OUTPUT Profile #PF#l E.G. E1ev (ft) Right OB vel Head Cft) 0.100 w.s. E1ev (ft) 114.21 Crit w.s. eft) 0.37 E.G. slope (ft/ft) 0.37 Q Total (cfs) 0.26 TOp Width (ft) 1.26 vel Total (ft/s) 0.71 Max ch1 Dpth (ft) 0.29 conv. Total (cfs) 331. 53 0.94 330.59 0.013230 13000.00 169.45 7.78 14.69 113020.2 Element Wt. n-va1. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) TOp Width (ft) Avg. vel. (ft/s) Hydr. Depth (ft) Conv. (cfs) page 13 E1ev Sta E1ev 385 820.36 380 360 882.06 355 335 929.59 330 318 991. 86 317 317 1021. 52 318 319 1076.35 319 334 1124.08 334 360 1236.15 365 368 1309.25 367 360 1389.89 359 357 1433.14 358.6 coeff contr. Expan. .1 .3 Left OB channel 0.100 0.100 62.17 102.86 0.40 1670.24 0.40 i670.24 0.29 12999.45 1.37 166.83 0.71 7.78 0.29 10.01 2.5 1~3015.4 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep 2.3 Length wtd. (ft) 102.86 wetted Per. (ft) 1.49 171.88 1. 39 Min ch El (ft) 315.90 shear (lb/sq ft) 0.22 8.03 0.22 Alpha 1.00 Stream power (1 b/ft s) 0.16 62.47 0.16 Frctn Loss (ft) 1.72 Cum volume (acre-ft) 0.03 5.73 0.01 C & E Loss (ft) 0.05 Cum SA (acres) 0.02 0.58 0.01 warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 2 INPUT Description: cross-Section #2 station Elevation Data num= 44 Sta Elev Sta Elev Sta 817.95 390 835.8 385 848.86 886.76 365 897.43 360 907.12 937.72 340 945.29 335 955.45 992.43 316 995.62 315 1000 1022.62 317 1040.86 317 1070.99 1095.8 330 1112.35 330 1124.85 1145.49 330 1163.01 335 1179.36 1223 355 1240.82 360 1256.16 1427.66 360 1472.02 358 1477.48 Manning's n values Sta n val Sta num= 3 n val Sta 817.95 .1 955.45 .1 1095.8 Elev Sta 380 861. 86 355 915.7 330 964.03 314.34 1004.39 317 1079.24 329 1132.22 340 1191. 6 365 1318.92 357.6 1501.06 n val .1 Bank Sta: Left Right 955.45 1095.8 Lengths: Left Channel Right 181.76 92.2 63.34 CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right OB vel Head (ft) W.S. Elev (ft) 63.34 crit w.s. (ft) E.G. slope (ft/ft) Q Total (cfs) 329.76 1.48 328.27 0.021693 13000.00 Element Wt. n-val. Reach Len. (ft) Flow Area (sq ft) Area (sq ft) Flow (cfs) page 14 El ev Sta 375 874.73 350 925.43 325 974.02 315 1011.84 320 1089.41 328.33 1142.44 345 1208 369.8 1372.13 358.6 . coeff Cant r . .1 Elev 370 345 320 316 325 329 350 365 Expan. .3 Left OB channel 0.100 181.76 92.20 1329.82 1329.82 13000.00 I I I I I I I I I I I I I I I I I I I TOP width (ft) SMC_Developed.rep 135.19 TOp Width (ft) 135.19 vel Total (ft/s) 9.78 Avg. vel. (ft/s) 9.78 Max chl Dpth (ft) 13.93 Hydr. Depth (ft) 9.84 Conv. Total (cfs) 88263.4 Cony. (cfs) 88263.4 Length wtd. (ft) 92.38 Wetted Per. (ft) 140.87 Min ch El (ft) 314.34 shear (lb/sq ft) 12.79 Alpha 1.00 Stream Power (1 b/ft s) 124.98 Frctn LOSS (ft) 1.16 Cum volume (acre-ft) 0.03 2.19 0.01 C & E Loss (ft) 0.31 Cum SA (acres) 0.02 0.22 0.01 warning: The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for additional cross sections. warning: The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than 0.7 or greater than 1.4. This may indicate the need for additional cross sections. warning: The energy loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. This may indicate the need for additional cross sections. CROSS SECTION RIVER: San Marcos creek REACH: 1 RS: 1 INPUT Description: cross-section #1 D/S (Dr. chang's Cross section #6:047) station Elevation Data num= 35 Sta Elev sta Elev Sta 879.61 353.9 893.38 350 911.57 948.88 330 957.68 325 968.62 985.29 313 989.11 312 1000 1030.85 314 1034.87 315 1042.44 1060.24 327 1131.57 327 1135.93 1170.78 345 1186.7 350 1204.59 1269.54 369 1349.66 365 1408.31 Manning's n values Sta n val Sta num= 3 n val Sta 879.61 .035 968.62 .035 1042.44 Elev Sta 345 924.79 320 974.88 311. 76 1010.89 320 1054.34 330 1140.53 355 1223.18 360 1458.18 n val .035 Bank Sta: Left Right 968.62 1042.44 Lengths: Left Channel Right o CROSS SECTION OUTPUT Profile #PF#l E.G. Elev (ft) Right DB vel Head (ft) 328.29 4.58 o 0 Element Wt. n-val. page 15 Elev Sta 340 937.35 315 980.16 312 1025.07 325 1056.34 335 1150.46 360 1239.57 357.21 1480.39 coeff Cont r . .1 Left DB 0.035 El'ev 335 314 313 326 340 365 358.65 Expan. .3 Channel 0.035 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep 0.035 W.S. Elev (ft) 323.71 Reach Len. (ft) Crit W.S. (ft) 323.71 Flow Area (sq ft) 15.05 742.26 16.37 E.G. slope (ft/ft) 0.008168 Area (sq ft) 15.05 742.26 16.37 Q Total (cfs) 13000.00 Flow (cfs) 81.80 12828.42 89.78 TOp Width (ft) 90.76 TOp width (ft) 8.11 73.82 8.83 vel Total (ft/s) 16.80 Avg. vel. (ft/s) 5.44 17.28 5.49 Max chl Dpth (ft) 11.95 Hydr. Depth (ft) 1.85 10.06 1.85 Conv. Total (cfs) 143845.6 Conv. (cfs) 905.1 141947.0 993.5 Length wtd. (ft) wetted Per. (ft) 8.92 77.64 9.57 Min ch El (ft) 311.76 shear (lb/sq ft) 0.86 4.87 0.87 Alpha 1.05 Stream Power (1 b/ft 5) 4.67 84.25 4.78 Frctn Loss (ft) Cum Volume (acre-ft) C & E Loss (ft) Cum SA (acres) warning: slope too steep for slope area to converge during supercritical flow calculations (normal depth is below critical depth). Water surface set to critical depth. SUMMARY OF MANNING'S N VALUES River:San Marcos creek Reach River Sta. n1 n2 n3 1 11 .1 .1 .1 1 10.5 Bridge 1 10 .1 .1 .1 1 9 .1 .1 .1 1 8 .1 .1 .1 1 7 .1 .1 .1 1 6 .1 .1 .1 1 5 .1 .1 .1 1 4 .1 .1 .1 1 3 .1 .1 .1 1 2 .1 .1 .1 1 1 .035 .035 .035 SUMMARY OF REACH LENGTHS River: San Marcos creek Reach River Sta. Left channel Right Page 16 I I I I I I I I I I I I I I I I I I I SMC_Developed.rep 1 11 219 219 219 1 10.5 Bridge 1 10 198 120.5 71.1 1 9 75 81.4 35 1 8 111.43 120.3 120 1 7 73.52 100.15 106.36 1 6 84.54 84.95 104.32 1 5 106.38 83.7 84.95 1 4 77.73 90.76 77 .43 1 3 62.17 102.86 114.21 1 2 181. 76 92.2 63.34 1 1 0 0 0 SUMMARY OF CONTRACTION AND EXPANSION COEFFICIENTS River: San Marcos creek Reach River Sta. contr. Expan. 1 11 .1 .3 1 10.5 Bridge 1 10 .1 .3 1 9 .1 .3 1 8 .1 .3 1 7 .1 .3 1 6 .1 .3 1 5 .1 .3 1 4 .1 .3 1 3 .1 .3 1 2 .1 .3 1 1 .1 .3 profile output Table -standard Table 1 Reach River sta profil e Q Total Mi n ch El W.S. Elev crit W.S. E.G. Elev E. G. slope vel chnl Flow Area TOP width Froude # chl Ccfs) Cft) Cft) Cft) Cft) Cft!ft) Cft!s) (sq ft) Cft) 1 11 PF#l 13000.00 323.50 338.41 332.22 338.87 0.007496 5.42 2411.34 289.12 0.32 1 10.5 Bridge 1 10 PF#l 13000.00 321. 50 337.03 337.25 0.002359 3.79 3522.49 324.93 0.19 1 9 PF#l 13000.00 320.50 336.26 336.78 0.006156 5.91 2370.47 288.90 0.31 1 8 PF#l 13000.00 320.40 335.89 336.28 0.005544 5.18 2670.78 544.46 0.29 1 7 PF#l 13000.00 319.72 335.08 335.53 0.007115 5.99 2661. 59 398.53 0.32 1 6 PF#l 13000.00 318.60 334.08 334.69 0.009309 6.32 2136.27 271.72 0.36 1 5 PF#l 13000.00 318.33 333.10 333.81 0.011158 6.82 1930.75 229.36 0.40 1 4 PF#l 13000.00 317.44 331.92 page 17 I I I I I I I, I I I I I I I I I I I I 1 1 1 332.77 331. 53 329.76 328.29 0.0l3805 3 0.0l3230 2 0.021693 1 0.008168 SMC_Developed.rep 7.37 1770.89 PF#l l3000.00 7.78 1671.01 PF#l l3000.00 9.78 l329.82 PF#l 13000.00 17.28 773.68 Page 18 208.82 0.44 315.90 330.59 169.45 0.43 314.34 328.27 l35.19 0.55 311. 76 323.71 323.71 90.76 0.96 I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 5 PRE-DEVELOPED CONDITIONS FLOODPLAIN EXHIBIT DE:de h,lreportsI17511136UomrUomr_01,doc w,o,1751·136 9110/200910:06 AM VICINITY HUNSAKER & ASSOCIATES SAN DIECo, INC PlANN!NG 10179 Huemekens Street ENCINHRING San lJi!go. Ca 92121 SUR""""" I'H(8.\ll}S584SOO· 1X(858)55a."'" ~_,: .. LIMIT OF GRADING ~'u/"\LC 1 :20 EXISTING FIRM EXHIBIT FOR LA COSTA RIDGE NEIGHBORHOOD 2.6 CllY OF CARLSBAD, CAUFORNIA SHEET 1 OF 1 R'\0459\8.Hyd\0459$H10-EX-FIRM.dwg[ 20B51Mo.r-05-2007.17.37 '" ,., I ;0 ... ~ "" 6 "" I I I I I I I I I I I I I I I I I I I La Costa Ridge 2.6 Letter of Map Revision Based on Fill CHAPTER 6 DEVELOPED CONDITIONS FLOODPLAIN EXHIBIT DE:de h:\reports\17511136~omr\Jom,-01.doc w.o.17S1-136 91101200910:06AM I I I I I I I I I I I I I I I I I I I File No: 04605721 EXHIBIT "A" All that certain real property situated in the County of San Diego, State of California, described as follows: That portion of the Lot 5 of the Partition of Rancho Guajome as designated on the Partition Map attached to and made a part of the report of the referees in Partition of said Rancho and adjoining lands, in that certain action in the Superior Court of San Diego County, wherein Suzie G. Couts was plaintiff and Richard O'Neill, Sr., et ai, were defendants, which Report and Map are file in the Office of the Clerk of said Superior Court Case No. 10201, in the City of Vista, County of San Diego, State of California, described as follows: Commencing at the most Easterly corner of land described in Parcel 3 of Deed to M.L. Knapp, et ai, filed in the Office of the County Recorder of San Diego County, April 30, 1942, in the Book 1340, Page 248, Official Records of San Diego County; thence Southeasterly along the center of line R.S. 392, a Plat of which is on file in the Office of the County Engineer of San Diego County, South 17° 59' 00" East, 300.00 feet; thence South 72° 01' 00" West, parallel with the Southeasterly line of said Parcel 3 of said Knapp's Land, at right angles to the center line of said R.S. 392, 794.00 feet, more or less, to a point in the Easterly line of that Tract of Land designated on said Partition Map as "Estate of Ysidora B. De Couts, 100.09 Acres"; thence South 6°22'30" West along said £;:asterly line 616.04 feet to the Point of Beginning; said pOint of beginning also being the Southwest corner of that land described in grant deed to Contra Costa School Financing Authority filed in the Office of the County Recorder of San Diego County September 9, 1992 as Document No. 1992-0572492 of Official Records; thence continuing along the prolongation of said Easterly line 522.53 feet to a point in the North line of Section 13, Township 11 South, Range 4 West, San Bernardino Meridian; thence North 88°54'39" West along said North line 1,089.69 feet to a point in the Southeasterly boundary of the original Rancho Guajome; thence South 33°46'51" West (South 33°18'00" West per Certificate of Compliance PC18-036 filed in the Office of the County Recorder of San Diego County September 9, 1992 as Document No. 1992-0572490 of Official Records), 1,073.80 feet along said Southeasterly boundary to the Southeast corner of Rancho Guajome; thence leaving said boundary South 01°21'38" West, 415.48 feet, more or less, to a point on the Southerly line of Lot 5 of "Rancho Guajome and lands adjoining," according to partition map in Superior Court Cast No. 10201, filed in the Clerks Office of San Diego County; thence South 88°38'22" East (South 89°14'20" East per said Certificate of Compliance) along the Southerly line of said Lot 5, 1,201.42 feet to the Southwesterly corner of the land described in administrators deed to San Marcos Development Co., recorded April 18, 1977 as File No. 77-140842 of Official Records; thence along the boundary line of said land North 0°31'23" East (North 615.00 feet per said Certificate of Compliance), 615.80 feet; thence North 54°32'05" East, 1,214.32 feet; thence North 81°30'29" East, 940.59 feet; thence North 69°52'23" East, Page 3 I I I I I I I I I I I I I I I I I I I File No: 04605721 50.00 feet to the center line of said Road Survey No. 392; thence Northerly along the center line of said Road Survey North 20°07'37" West, 338.76 feet to the beginning of a tangent 1,000 foot radius curve concave Southwesterly; thence Northwesterly along the arc of said curve through a central angle of 15°42'52", an arc length of 274.27 feet; thence leaving said curve North 35°50'29" West 68.57 feet to the most Easterly corner of said school land; thence South 58°59'53" West (South 58°23'12" West per said deed), 498.36 feet to the beginning of a tangent 600 foot radius curve concave Northerly; thence Westerly along the arc of said curve through a central angle of 35°49'46" an arc length of 375.21 feet; thence tangent to said curve North 85°10'20" West, 181.37 feet; thence North 30°49'39" West, 62.25 feet; thence North 83°37'36" West 135.02 feet to the point of beginning, as described in Parcel A of Certificate of Compliance recorded April 18, 2003 as File No. 2003-0452092 of Official Records. Assessor's Parcel Number: 159-090-45 Page 4 '" .I/l, E ! 01; I /Xl' o ~ "' ~ r- -'--_." ,''',_. '-.-~<-. '_ <,',l",. .;. .. 30" RCP STROM DRAIN PER OWG # 351-5 ~~~~~~~E~XI~ST~IN~G~~ R=530' 8=07'40'37" L=71.01' \ IMPRO\'EMIONT PLANS, DWG C)'~ ~ "'" ~.:;. EXIST. 12" ~ ~""'-~AIN "" EXIST, 16" " ~ER DWG !l20()-2 .. ".S, ~W/ EXIST. 24" RCP S'l'SRlf!iI' DRAIN PER DWG ABMl[)ONe[~<!'( I ~~~~~~l£!1!~ PER DWG PER MAP CT 05-13 ~ ~=1~~~".c "" EXIST. 24" RCP STORM DRAI~R DWG #200-BANDONED AND CAP ED IN PLAI8Ei'~ \EXIST. 48" RCP , STORM DRAIN Dwe Ijj~,~'"Ji'" 2 (1YP.) , \ \,-- EX --'\. 1ST, TRAIL \ \ \ \ \ \ \ \ ) ) , gl I~ - \ () ~ \Y \ l I I , <&-~. I 'U"V, I '-;,y ,31 /y , c> r,x),:qv 48 P353.8 ./ ~O«t 15 29 P352,6 gl I, II '. \ 44 \ P350.4 , _lJJ..O.2S / / , , 43 EXCLUSIVE USE AREA CALCULATIONS CMSrRUCT UNlfD DITt.'H EXCLUSIVE USE AREA NO. EXCLUSIVE USE AREA PER S.D. R. S. D. 0-75 IJ--===:.:.::..=:...:..::.::::.::...:.:.:::....-+--..:::==:=....:~~~~~-l TYPE .'8' 1 5,429 '\\.\}\''''' ""---, ~Q~~~~~~~~~1~~~1~O;. SEWER , FORCE MAIN PER. 2 5,246 , / 2.ti" !?J53.1 , I VALLECITOS WATER DISlRlCT (FOR GRADING PURPOSES ONLy) BY: A6 /P"?o~ VALLECITOS WATER DISTRICT DATE Hk.A 1 i7 /7010 I I DWG #2054-~,' 3 5,369 4 6,255 \ iI.i-I.-r--EXIST. 8" __ ,j, __ C "-,ffVl..C 5 5,573 . , ' , I r .J, . • \,1 '1:. ----I---fr.- 0-75 , /fXTe/ll.D CHANNeL 7 8 10 12 13 19 102 4,915 4,651 . 4,207 3,862 3,866 3,930 4,220 4,076 3,870 4,280 3,999 '6 "PVC FOR LOWI;L.~====j!t====t===j~t===j CONNE"CT ro D i!. I <c \ I ~~L .: -,...-. \ I ~ \ I I I ( .:: I \ / .<c / / I I PL= 3.33 ± 22 24 25 26 27 29 31 32 33 34 36 45 --'I t It O' 20' 40' 80' I ~~iiiiiiiiiiiiiii~ 51 53 RES. SUBTOTAL RES. AVERAGE LOT AREA Si:E '$!fEET Z Potr NGW cIt/GIN£i:ROF WOR,A( oecl..ARATIOA! NOTE: _ • SEE SHEETS 7 & f! FOR RETAINING AND SOUND WALL ELEVATIONS & PROFILE RES. MAX LOT AREA RES. MIN LOT AREA REQUIRED TREATMENT CONTROL BMP TABLE ReMOVe 'p~Rrlo!ll ex. CHANNEl. 'f'REPtl(lJl? TO DESCRIPTION CDS UNIT 20-15 TC-30 VEGETATED SWALE QUANTITY lEA 80 LF DAVID EVANS 1~~Q~:ftii~ICQFOIf'M WITiI NEW OITCH. !n /IE DfTCfI WEt..D~[J WIRe AND ASSOCIATES INC. 4200 Concours. SuRe 200 Ontario California 91764 MESH Ttl CNANNEL .~TI"J:I I DITCH CONNeCTIoN De/AlL '8' N.r:S . Phone: 909.481.5750 Fax: 909.481.5757 3,982 4,571 4,178 3,960 3,656 4,948 4,494 4.868 4,17D 3,870 3,870 4,141 4,143 6,398 3,911 4,360 4,065 4,573 4,858 4,155 4,008 5,272 3.828 4,229 237,971 4,490 3,710 BENCH MARK DESCRIPTION: K-302. A sm. DISK STAMPED K 302 1935. SET IN lHE TOP OF A CONCRETE POST. LOCATION: LIES 8.5' EASTERLY OF EASTERN BERM LINE RECORDED: ON RANCHO SANTA FE ROAD, 133' NORlHERL Y OF ELECTRIC TRANSMISSION LINE POLE MARIKED I "lL23011" AND "TL13825" ELEVATION: 533.39 DATUM: NGVD 1929 "AS BUILT'':'.!.oH,( ,)//0 , EXP • .=..::...L __ DATE REVIEWED BY: INSPECTOR r--1 __ -r~ ________________ -+ __ -r __ ~~ __ ~I.SH3EETI CITY OF CARLSBAD ISHEE~I ~~~~~E~N~G~IN~E~E~RI~N~G~D~E~P~AR~T~M~E~NT~~~~8~~ 1----t--t-----------------1I---+--I--+~-I GRADING, EROSION CONTROL .AND STORK DRAIN PLANS FOR: LA COSTA RIDGE NEIGHBORHOOD 2.6 ROUGH GRADING 1---+--1------------+---+--+--+---1 APPROVED: DAID ~ER . 11.J o. ~~~~~~?!5.~:E;~~~;~;;;TI£=t~~~~#~~~~8 DEPUTY CITY .ENGINEER PE 33081 EXPIRES 6 30 10 'D~ OWN BY: PROJECT NO. DRAWING NO. ON D CHKD BY: -=,..--REVISI ESCRIPTION OlHER APPROVAL ClTY APPROVAL RVWD BY: PEl!. CT 05 ..... 13 448-3A \ 1\ 1Ir"'\ \I "''''\. r\ "..., 1"\ A ..