HomeMy WebLinkAboutCT 05-13; LA COSTA RIDGE NBHGD 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
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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
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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.
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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
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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
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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.
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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
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6 I 33005'3T" 1 ........ !1J!il
lrr-IS"OCr
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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-..~.
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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~
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UNDEVELOPED COASTAl. B.\RR1ERS
~ tTI ~ ........ ....... 11&) 1!I9'O ~ ...... CooslaI_I_"'~IDcaIIICI~Df~1D~ FlaadHoald.Atou..
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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 ....... _-
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Cor!>Int~.mb.IIoowI ... .......nt .. atu-. ~at'ChltIl1lOfl.The_ tIIIIUId __ "",,,~mM:Ia"to_...-ft~
..... "-~~tr:lu.. .......... "'u.fl'ilp.
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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
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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
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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.
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so
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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
,. -'
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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.
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~
.~
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
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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.
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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
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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
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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
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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
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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 ,
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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 ~
{/
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I Seal (optional)
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I DHS -FEMA Form 81-87 A, DEC 07 Elevation Form MT-1 Form 2 Page 16 of 2
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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
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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.
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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
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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
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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
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~
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.
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La Costa Ridge 2.6
Letter of Map Revision Based on Fill
CHAPTER 2
FLOODPLAIN ANALYSIS METHODOLOGY
HEC-RAS
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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.
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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.
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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.
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La Costa Ridge 2.6
Letter of Map Revision Based on Fill
CHAPTER 3
PRE-DEVELOPED CONDITIONS
HEC-RAS RESULTS
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La Costa Ridge 2.6
Letter of Map Revision Based on Fill
CHAPTER 3.1
PRE-DEVELOPED SUMMARY TABLE
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- - -------- - - - - - - - - -
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
~~-----~---.. -
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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
- ----- ---
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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
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':1
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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---'-----------'
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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
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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
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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
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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
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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
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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
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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
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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
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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
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warning: Divided flow computed for this cross-section. I CROSS SECTION
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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La Costa Ridge 2.6
Letter of Map Revision Based on Fill
CHAPTER 4
DEVELOPED CONDITIONS
HEC-RAS RESULTS
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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
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-- - ----- - -- -- - - ----'
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 --------
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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
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--
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
------.. --
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La Costa Ridge 2.6
Letter of Map Revision Based on Fill
CHAPTER 4.1.2
CHANNEL PROFILE
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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
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.' 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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
""
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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
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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
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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;
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/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
/
/
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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 ..