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HomeMy WebLinkAboutDrainage ReportDRAINAGE REPORT FOR CARTER'S CROSSING, PHASES 1-4 RB 11 11 COLLEGE STATION, TEXAS JULY2007 MBESI# 1015-0006 SUBMITTED BY: McCLURE & BROWNE ENGINEERING/SURVEYING, INC. 1008 Woodcreek Drive, Suite 103 •College Station, Texas 77845 (979) 693-3838 •Fax: (979) 693-2554 •Email: McClureBrowne@Verizon.net CERTIFICATION Drainage Report for Carter's Crossing Subdivision Phases 1 through 4 MEES!# 1015-0006 I, Jeffery L. Robertson, Registered Professional Engineer No. 94745, State of Texas, certify that this report for the drainage design of Carter's Crossing Subdivision, Phases 1 through 4, was prepared by me in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners thereof. SUMMARY This Drainage Report for Carter's Crossing Subdivision analyzes the proposed storm drain and culvert systems in Phases 1 through 4 of the subdivision. It has been determined that the runoff from this site can be released un-detained without causing harmful effects to the downstream property. GENERAL INFORMATION Area encompassed by Phases 1-4: Anticipated land use: Anticipated number of lots: Notes on surrounding development: FLOOD HAZARD INFORMATION FEMA FIRM Map #: 48041CO163C Effective Date: July 2, 1992 47.737 acres Single family residential 140 lots The property is bordered by Raintree Subdivision and Northrop Grumman Corp. to the north, St. Thomas Church to the west, Emerald Forest Subdivision to the South, and undeveloped land to the east. Comments: No portion of the site is shown to be within the 100-year floodplain, so it is not currently regulated under the National Flood Insurance Program. Applicable F.xhibits: A Excerpt of FEMA FIRM DESCRIPTION OF DRAINAGE SYSTEMS Primary System: The site is open with dense vegetation around the creek channels. The site naturally drains to a tributary of Carters Creek, which runs from west to east within the site. Secondary System : Drainage Report Runoff from the residential lots will flow into the streets where it is captured by inlets and conveyed through underground pipes to the existing creek channel. Page 1of4 Carter's Crossing Subdivision Phases 1 through 4 Applicable Exhibits: B-1 Drainage Area Map (HEC-HMS and HEC-RAS) B-2 Drainage Area Map (For Storm Drain Pipe and Inlet Sizing) C-1 Rational Formula Drainage Area Calculations C-2 Inlet Computations C-3 Pipe Size Calculations C-4 10 Year Hydraulic Grade Line Computations C-5 100 Year Hydraulic Grade Line Computations D-1 HEC-HMS (Pre Development) D-2 HEC-HMS (Post Development) D-3 Drainage Area Parameters E HEC-RAS Analysis F-1 Letter of Agreement with Downstream Property Owner G-1 Hydraulic Grade Line Drawings DETENTION & FLOODPLAIN ANALYSIS Design Storm : 100-yr Return Period Design Methodology Hydrology: Software Model: Curve Numbers: SCS Method HEC-HMS v3.0.l, HEC-RAS v3.l.2 Impervious Area = 98 Medium Density Residential= 87 Undeveloped Area = 75 SECONDARY STORM DRAIN DESIGN Design Storm: Design Methodology Hydrology: Software Model: Time of Concentration: Runoff Coefficients: Hydraulics: Software Model: Manning 's N: 10-yr Return Period Rational Formula Excel Spreadsheet lOmin. 0.40 -Undeveloped area 0.55 -Residential areas 0. 90 -Paved areas Manning's Equation Excel Spreadsheet 0.012 (concrete pipe or HDPE pipe) DETENTION REQUIREMENTS General Note : Detention for Carter's Crossing Subdivision (all phases) is not needed due to its location in the Carters Crossing Drainage Basin. The pre-and post-development storm flows were calculated to determine the impact on downstream property. A small increase in the runoff and the water surface elevation has been shown. However, the increase is negligible and the down stream property owner has been notified and a written agreement is attached to this report. The table below shows the results of the analysis at the end of the project (Sta. 3+00). Drainage Report Carter's Crossing Subdivision Phases 1 through 4 Page 2 of 4 Storm Pre-Dev Event Conditions 5 229 cfs 10 292 cfs 25 366 cfs 50 419 cfs 100 I 482 cfs EROSION AND SEDIMENTATION CONTROLS Control Measures: Silt fence Hydromulch seeding Inlet protection Construction entrance/exit Post-Dev Conditions 242 cfs 305 cfs 379 cfs 431 cfs 494 cfs SWPPP: The contractor shall be responsible for establishing and maintaining the SWPPP in accordance with TCEQ requirements. Drainage Report Carter's Crossing Subdivision Phases 1 through 4 Page 3 of 4 7: .'' 3' :· NTS EXHIBIT A Flood Insurance Rate Map Excerpt Brazos County, Texas and Incorporated Areas Map Numbers: 48041 C0163C Effective Date: July 2, 1992 ~ 3:: 0 0 0:: w ..... ..... c( c( 0. c( IL w ~ 0 I= .... 0 ..... z c( z C) c( ~ z w 0 5i!= c( ..... w ::E ..... z ~ !!! ~ 0 w ~ 0:: C) ~ iii > ~z g z 0:: ~ c( g o~ 0 ::I c( 0. NO. AC. 0.4 0.66 0.9 ft. 1.0 2.22 2.22 0.00 0.00 0.89 449.0 2.0 0.53 0.00 0.53 0.00 0.29 1.0 3.0 0.51 0.00 0.51 0.00 0.28 1.0 4.0 1.08 0.00 1.08 0.00 0.59 1.0 5.0 1.65 0.00 1.65 0.00 0.91 1.0 6.0 2.05 0.00 2.05 0.00 1.13 1.0 7.0 1.28 0.00 1.28 0.00 0.70 1.0 8.0 1.97 0.00 1.97 0.00 1.08 1.0 9.0 1.61 0.00 1.61 0.00 0.89 1.0 10.0 0.91 0.00 0.91 0.00 0.50 1.0 11.0 0.99 0.00 0.99 0.00 0.54 1.0 12.0 0.58 0.00 0.58 0.00 0.32 1.0 13.0 0.53 0.00 0.53 0.00 0.29 1.0 14A 0.24 0.00 0.24 0.00 0.13 1.0 148 0.63 0.00 0.63 0.00 0.35 1.0 15A 0.53 0.00 0.53 0.00 0.29 1.0 158 0.54 0.00 0.54 0.00 0.30 1.0 16A 0.32 0.00 0.32 0.00 0.18 1.0 168 0.93 0.00 0.93 0.00 0.51 1.0 17A 0.17 0.00 0.17 0.00 0.09 1.0 178 0.25 0.00 0.25 0.00 0.14 1.0 101 .0 1.28 0.00 1.28 0.00 0.70 250.0 105.0 5.85 0.00 5.85 0.00 3.22 138.0 105.1 0.00 0.00 0.00 0.00 0.00 1.0 104.0 1.22 0.00 1.22 0.00 0.67 97.0 106.0 2.26 0.00 2.26 0.00 1.24 1.0 106.1 0.00 0.00 0.00 0.00 0.00 1.0 106.2 0.00 0.00 0.00 0.00 0.00 1.0 103.0 1.23 0.00 1.23 0.00 0.68 215.0 107.0 1.39 0.00 1.39 0.00 0.76 1.0 108.0 1.43 0.00 1.43 0.00 0.79 1.0 119.0 8.00 8.00 0.00 0.00 3.20 500.0 127.0 0.29 0.00 0.29 0.00 0.16 1.0 128.0 0.17 0.00 0.17 0.00 0.09 1.0 129.0 0.87 0.00 0.87 0.00 0.48 1.0 130.0 0.81 0.00 0.81 0.00 0.45 1.0 133.0 2.30 0.00 2.30 0.00 1.27 1.0 135.0 0.81 0.00 0.81 0.00 0.45 1.0 EXHIBIT C-1 Rational Formula Drainage Area Calculations CARTER'S CROSSING PHASES 1 THROUGH 4 3:: 0 3:: 3:: ..... IL 0 0 0 ..... ..... z IL IL ~ 5 0:: j!: 0:: ~ ..... u ~ ~ 0:: ..... ~ C) 0 u ~ ..... ::I z ::I ..... ..... w 0 :: C) ~ C) :: ~ "ii U) s IO 0 ::I £! !!! a ft. ft. ft. ft/s min min In/Hr cfs In/Hr cfs 2.0 1.0 1.0 0.5 15.9 15.9 5.04 4.5 6.2 5.5 1.0 1.0 2.0 11.3 0.0 10.0 6.33 1.8 7.7 2.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.8 7.7 2.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 3.8 7.7 4.6 1.0 1.0 1.0 10.4 0.0 10.0 6.33 5.7 7.7 7.0 1.0 1.0 1.0 10.4 0.0 10.0 6.33 7.1 7.7 8.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 4.5 7.7 5.4 1.0 1.0 1.0 10.4 0.0 10.0 6.33 6.9 7.7 8.3 1.0 1.0 1.0 10.4 0.0 10.0 6.33 5.6 7.7 6.8 1.0 1.0 1.0 10.4 0.0 10.0 6.33 3.2 7.7 3.9 1.0 1.0 1.0 10.4 0.0 10.0 6.33 3.4 7.7 4.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 2.0 7.7 2.5 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.8 7.7 2.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.8 7.7 1.0 1.0 1.0 1.0 10.4 0.0 10.0 6.33 2.2 7.7 2.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.8 7.7 2.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.9 7.7 2.3 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.1 7.7 1.4 1.0 1.0 1.0 10.4 0.0 10.0 6.33 3.2 7.7 3.9 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.6 7.7 0.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.9 7.7 1.1 2.0 150.0 1.0 0.8 8.1 10.0 6.33 4.5 7.7 5.4 1.4 861 .6 3.8 1.2 14.2 14.2 5.35 17.2 6.6 21 .1 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.0 7.7 0.0 1.0 387.0 4.0 1.5 5.5 10.0 6.33 4.2 7.7 5.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 7.9 7.7 9.6 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.0 7.7 0.0 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.0 7.7 0.0 2.0 98.0 1.0 0.9 6.1 10.0 6.33 4.3 7.7 5.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 4.8 7.7 5.9 1.0 1.0 1.0 10.4 0.0 10.0 6.33 5.0 7.7 6.1 2.0 884.0 5.0 0.8 28.5 28.5 3.58 11 .4 4.5 14.3 1.0 1.0 1.0 10.4 0.0 10.0 6.33 1.0 7.7 1.2 1.0 1.0 1.0 10.4 0.0 10.0 6.33 0.6 7.7 0.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 3.0 7.7 3.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 2.8 7.7 3.4 1.0 1.0 1.0 10.4 0.0 10.0 6.33 8.0 7.7 9.7 1.0 1.0 1.0 10.4 0.0 10.0 6.33 2.8 7.7 3.4 0 IO 0 .... IO N !: a £! a In/Hr cfs In/Hr cfs 7.0 6.2 8.0 7.1 8.6 2.5 9.9 2.9 8.6 2.4 9.9 2.8 8.6 5.1 9.9 5.9 8.6 7.8 9.9 8.9 8.6 9.7 9.9 11 .1 8.6 6.1 9.9 6.9 8.6 9.4 9.9 10.7 8.6 7.6 9.9 8.7 8.6 4.3 9.9 4.9 8.6 4.7 9.9 5.4 8.6 2.8 9.9 3.1 8.6 2.5 9.9 2.9 8.6 1.1 9.9 1.3 8.6 3.0 9.9 3.4 8.6 2.5 9.9 2.9 8.6 2.6 9.9 2.9 8.6 1.5 9.9 1.7 8.6 4.4 9.9 5.0 8.6 0.8 9.9 0.9 8.6 1.2 9.9 1.4 8.6 6.1 9.9 6.9 7.4 23.8 8.5 27.2 8.6 0.0 9.9 0.0 8.6 5.8 9.9 6.6 8.6 10.7 9.9 12.3 8.6 0.0 9.9 0.0 8.6 0.0 9.9 0.0 8.6 5.8 9.9 6.7 8.6 6.6 9.9 7.5 8.6 6.8 9.9 7.8 5.1 16.3 5.8 18.7 8.6 1.4 9.9 1.6 8.6 0.8 9.9 0.9 8.6 4.1 9.9 4.7 8.6 3.8 9.9 4.4 8.6 10.9 9.9 12.5 8.6 3.8 9.9 4.4 0 ~ 0 0 ~ 0 .... a !: a In/Hr cfs In/Hr cfs 9.1 8.1 10.2 9.1 11 .1 3.2 12.5 3.7 11 .1 3.1 12.5 3.5 11 .1 6.6 12.5 7.4 11.1 10.1 12.5 11.4 11 .1 12.6 12.5 14.1 11.1 7.8 12.5 8.8 11 .1 12.1 12.5 13.6 11 .1 9.9 12.5 11 .1 11 .1 5.6 12.5 6.3 11 .1 6.1 12.5 6.8 11 .1 3.6 12.5 4.0 11 .1 3.2 12.5 3.7 11 .1 1.5 12.5 1.7 11 .1 3.9 12.5 4.3 11 .1 3.2 12.5 3.7 11 .1 3.3 12.5 3.7 11 .1 2.0 12.5 2.2 11 .1 5.7 12.5 6.4 11 .1 1.0 12.5 1.2 11.1 1.5 12.5 1.7 11 .1 7.8 12.5 8.8 9.6 30.8 10.8 34.7 11 .1 0.0 12.5 0.0 11 .1 7.5 12.5 8.4 11 .1 13.9 12.5 15.6 11 .1 0.0 12.5 0.0 11.1 0.0 12.5 0.0 11 .1 7.5 12.5 8.5 11 .1 8.5 12.5 9.6 11 .1 8.8 12.5 9.9 6.6 21.3 7.5 24.1 11 .1 1.8 12.5 2.0 11 .1 1.0 12.5 1.2 11 .1 5.3 12.5 6.0 11 .1 5.0 12.5 5.6 11 .1 14.1 12.5 15.8 11 .1 5.0 12.5 5.6 7/1 8/2007 All Phases-dra-Exhiblt C1-C5.xls Exhibit C-1 EXHIBIT C-2 INLET COMPUTATIONS CARTER'S CROSSING PHASES 1 THROUGH 4 ~ . ~o i~ ~~ 1 2 3 4 a1 a. < ~ G,j Q ~ 'i: .s G,j = > a. o~ 0 = G,j a. = G,j bl) = = .... = a. ~ cfs na I 9.1 na I 2.5 na I 2.4 na I 5.1 a. G,j > 0 t' a. = u 0 ..... G,j :s ..... = 0 -; ..... Q E-4 -= ..... 'O ~ ..... G,j G,j a. ..... 00. ..... ~ .:: 00. 'O ~ G.l e' .!: '-" = G,j C" Cl. ~~ o.o I 9.1 I 271 1.4% o.o I 2.5 I 271 0.1% o.o I 2.4 I 271 0.1% o.o I 5.1 I 271 0.4% 5 na 7.8 I o.o I 7.8 I 271 1.0% 6 na 9.7 I o.o I 9.7 I 271 1.5% 7 na 6.1 I o.o I 6.1 I 271 0.6% 8 na 9.4 I o.o I 9.4 I 27 I 1.4% 9 na 7.6 I o.o I 7.6 I 271 1.0% 10 na 4.3 I o.o I 4.3 I 27 I 0.3% 11 na 4.7 I o.o I 4.7 I 271 0.4% 12 I na I 2.8 0.0 I 2.8 I 27 0.1% 13 I na I 2.5 o.o I 2.5 I 27 0.1% 148 I NA I 3.0 0.0 I 3.0 I 27 0.1% 158 I na I 2.6 0.0 I 2.6 I 27 0.1% 168 I na I 4.4 0.0 I 4.4 I 27 0.3% 178 I na I 1.2 o.o I 1.2 I 27 0.0% 101 I 106.0 I 6.1 0.0 I 6.1 I 27 0.6% 105 I 106 I 23.8 0.0 I 23.8 I 27 9.2% 105.1 I na I 0.0 0.0 I 0.0 I 27 0.0% 104 I 108 I 5.8 0.0 I 5.8 I 27 0.5% 106 I 107 I 10.7 I o.o I 10.7 I 271 1.9% 106.1 I na I o.o I o.o I o.o I 271 0.0% c z lZ :s lZ :s ~ 0 '3 Q E-4 1 I 9.1 2 I 2.5 3 I 2.4 4 I 5.1 5 I 7.8 6 I 9.7 7 I 6.1 8 I 9.4 9 I 7.6 10 I 4.3 11 I 4.7 12 I 2.8 13 I 2.5 14B I 3.0 15B I 2.6 16B I 4.4 17B I 1.2 101 I 6.1 105 I 23.8 105 I 0.0 104 I 5.8 106 110.7 106 I 0.0 DESCRIPTION Proposed Grate Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Inlet on Grade Junction Box Recessed Low Point Inlet Recessed Low Point Inlet Junction Box r.; ~ a. G,j ~ ~ -0 C" ~ ~ 'O G,j 'O ·~ Q a. ~ ~ Curb Inlet cfs I ft I ft 2.33 I 1.08 I 5 2.33 I 1.04 I 5 2.33 I 2.20 I 5 2.33 I 3.36 I 5 2.33 I 4.17 I 5 2.33 I 2.60 I 5 2.33 I 4.01 I 10 2.33 I 3.28 I 10 2.33 I 1.85 I 5 2.33 I 2.01 I 5 2.33 I 1.18 I 5 2.33 I 1.08 I 5 2.33 I 1.28 I 5 2.33 I 1.10 I 5 2.33 I 1.89 I 5 2.33 I 0.51 I 5 2.33 I 2.60 I 5 0.62138.49 I 10 2.33 I 2.48 I 5 2.33 I 4.60 I 5 a. -= . G,j ..... ~ > Cl. • 0 G,j 00. t' ~ ~ a. ~ ~ = 'O • u = ~ 0 :,, u 'O G,j a. ·s C" ~ = G,j a. < Grate Inlet 'O G,j 'O ·~ Q a. ~ = G,j a. < ft I cfs I sq-ft I sq-ft 01 0.5 I 1.9914.58 I 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 0 0 0 0 7/18/2007 All Phases-dra-Exhibit C1-C5.xls Exhibit C-2 EXHIBIT C-2 INLET COMPUTATIONS CARTER'S CROSSING PHASES 1THROUGH4 ~ . C-' 0 ~~ ~~ 106.2 103 107 108 119 127 = Qj ... < ~ Qj Q 1:)1) = ~ .!3 Qj = > ... o~ 0 = Qj ... = Qj 1:)1) = = ... = ... ~ cfs na I 0.0 107 I 5.8 na 1 6.6 na I 6.8 na I 16.3 130 I 1.4 ... Qj > 0 t' ... = u 0 0.0 0.0 0.0 0.0 0.0 0.0 ~ :s ... = 0 -= ... Q E-4 .= ... "'O ~ ~ Qj ... ... 00 ~ Qj ... ... 00 -"'O ,o Qj o" --·s Qj i:r Q. Qj Q ~ V3 o.o I 27 I 0.0% 5.8 I 27 I 0.6% 6.6 I 271 0.7% 6.8 I 27 I 0.8% 16.3 I 27 I 4.3% 1.4 I 381 0.1% 128 I 129 I 0.8 I o.o I 0.8 I 381 0.0% 129 I na I 4.1 I o.o I 4.1 I 381 0.6% 130 I na I 3.8 I o.o I 3.8 I 381 0.5% 133 I na I 10.9 I o.o I 10.9 I 271 2.0% 135 I na I 3.8 I o.o I 3.8 I 271 0.2% c:) z ~ :s ~ :s ... = 0 '3 Q E-4 106 I o.o 103 I 5.8 107 I 6.6 108 I 6.8 119 I 16.3 127 I 1.4 128 I 0.8 129 I 4.1 130 I 3.8 133 110.9 135 I 3.8 DESCRIPTION Junction Box Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet Recessed Low Point Inlet ~ ~ ... Qj ~ ~ -0 i:r ~ ~ "'O Qj "'O ·~ ... ~ ~ Curb Inlet cfs I ft I ft 2.33 I 2.50 I 5 2.33 I 2.83 I 5 2.33 I 2.91 I 5 2.33 I 6.97 I 10 2.33 I 0.59 I 5 2.33 I 0.35 I 5 2.33 I 1.77 I 5 2.33 I 1.65 I 5 2.33 I 4.68 I 5 2.33 I 1.65 I 5 ... .= . Qj ... ~ > Q. • 0 Qj 00 ~ ~ t "". "'O ~ ... Qj • = "'O ~ u = < 0 ~ u "'O Qj ... ·a i:r ~ = Qj ... < Grate Inlet "'O Qj "'O ·~ ... ~ = Qj ... < ft I cfs I sq-ft I sq-ft 0 0 0 0 0 0 0 0 0 0 0 7/18/2007 All Phases-dra-Exhibit C1-C5.xls Exhibit C-2 EXHIBIT C-3 PIPE SIZE CALCULATIONS CARTER'S CROSSING PHASES 1 THROUGH 4 = .~ = "' ~ Cl! e ~ ·;;; 0 < "O ~ ~ u Q ~ ~ z r-'l .... .... "O ~ ~ CJ:) "' ~ = ~ ~ = .... r-'l .... "'« .~ "O ii:: .=. ii:: ~ "' OS Q ~ 0 0 Col ~ =-"O Q <~ ~ ~ ~ ~ ~~ # # Ac. min yr cfs cfs 1 2 0.9 15.9 100 9.1 11.8 2 3 1.2 17.9 10 7.8 10.1 3 6 1.5 18.0 10 9.6 12.4 4 5 0.6 10.0 10 5.1 6.7 5 7 1.5 10.1 10 12.9 16.8 6 7 2.6 19.4 10 16.3 16.3 7 out 4.8 19.6 10 30.1 30.1 8 9 1.1 10.0 10 9.4 12.2 9 13 2.0 10.2 10 16.9 21 .9 10 11 0.5 10.0 10 4.3 5.6 11 13 1.0 10.2 10 9.0 11.7 12 13 0.3 10.0 10 2.8 3.6 13 158 3.6 10.7 10 30.5 30.5 148 158 0.5 12.4 10 3.8 4.9 158 168 4.7 12.7 10 36.6 36.6 168 178 5.4 13.0 10 41.4 41.4 178 Out 5.6 13.2 10 43.0 43.0 101 105.1 0.7 10.0 10 6.1 7.9 105 105.1 3.2 14.2 10 23.8 30.9 105.1 106 3.9 14.4 10 28.8 28.8 104 106 0.7 10.0 10 5.8 7.5 106 106.1 5.8 14.6 10 42.6 42.6 106.1 106.2 5.8 14.8 10 42.3 42.3 106.2 107 5.8 15.1 10 41 .8 41 .8 103 107 0.7 10.0 10 5.8 7.6 107 108 7.3 15.2 10 52.0 52.0 108 HW108 8.1 15.3 10 57.5 57.5 119 128 3.2 28.5 10 16.3 21 .1 127 128 0.2 10.0 10 1.4 1.8 128 Cul 3.5 28.7 10 17.5 22.8 133 HW133 1.3 10.0 10 10.9 14.2 135 HW135 0.4 10.0 10 3.8 5.0 •includes 33% Flow Increase for pipe sizes <27" dia. .. See Plan & Profile for pipe slope used (Pipe slope >or= Friction slope) « « ~ ~ Q. Q. "' ~ Q ~ -Q. ... 00 ~ ~ = ~ .:: .... Q ii:: .... r-'l Col ~ Q Q ·c: -z ~ ~ 00 # cfs % " 1 11 .8 0.23 24 1 10.1 0.17 24 1 12.4 0.26 24 1 6.7 0.34 18 1 16.8 0.46 24 1 16.3 0.05 36 1 30.1 0.1 7 36 1 12.2 0.24 24 1 21 .9 0.80 24 1 5.6 0.24 18 1 11 .7 0.22 24 1 3.6 0.10 18 1 30.5 0.47 30 1 4.9 0.18 18 1 36.6 0.25 36 1 41 .4 0.33 36 1 43.0 0.15 42 1 7.9 0.48 18 1 30.9 1.58 24 1 28.8 0.42 30 1 7.5 0.44 18 1 42.6 0.35 36 1 42.3 0.34 36 1 41 .8 0.33 36 1 7.6 0.44 18 1 52.0 0.51 36 1 57.5 0.63 36 1 21 .1 0.74 24 1 1.8 0.02 18 1 22.8 0.86 24 1 14.2 0.33 24 1 5.0 0.19 18 .J r-'l > fps ' 3.8 3.2 4.0 3.8 5.3 2.3 4.3 3.9 7.0 3.2 3.7 2.0 6.2 2.8 5.2 5.8 4.5 4.5 9.8 5.9 4.3 6.0 6.0 5.9 4.3 7.4 8.1 6.7 1.0 7.2 4.5 2.8 ~ .§ "O = ~ ~ ~ = = ~ r-'l ~ 'ii ~ z ~ @ ~ r-'l ... Col r-'l = ~ ~ ~ min min ' ' 455 2.02 17.89 30 0.16 18.04 312 1.31 19.35 30 0.13 10.13 110 0.35 10.48 30 0.22 19.57 147 0.58 20.15 45 0.20 10.20 199 0.48 10.67 30 0.16 10.16 39 0.17 10.33 30 0.25 10.25 209 0.56 11 .23 46 0.27 12.65 120 0.39 13.04 41 0.12 13.15 351 1.31 14.47 312 1.17 11 .17 109 0.18 14.36 70 0.20 14.56 38 0.15 10.15 85 0.23 14.79 126 0.35 15.14 23 0.07 15.21 179 0.70 10.70 30 0.07 15.28 40 0.08 15.36 54 0.13 28.67 41 0.67 10.67 446 1.03 29.70 n 0.29 10.29 29 0.17 10.17 7/18/2007 All Phases-dra-Exhibit C1-C5.xls Exhibit C-3 Inlets FL FL 1-W!!nin From To Upper Lower WSElev 010 178 OUT 250.9 248.75 253.39 42.96 168 178 251.2 251 254.04 41.36 158 168 252.11 251.64 254.25 36.57 13 158 253.39 252.36 254.56 30.46 9 13 255.05 253.89 255.93 16.87 8 9 255.33 255.15 257.62 9.36 148 158 254.11 253.86 254.56 3.77 11 13 254.14 253.89 255.89 8.96 10 11 254.79 254.64 256.08 4.32 12 13 254.44 254.19 255.89 2.75 7 OUT 252.91 252.06 255.28 30.11 6 7 253.16 253.01 255.66 16.35 3 6 256.19 253.26 255.74 9.57 2 3 256.49 256.29 257.23 7.77 1 2 258.5 256.59 257.52 6.21 108 HW108 247.83 247.52 250.56 57.49 107 108 248.02 247.93 251.18 51.99 106.2 107 248.19 248.12 251.34 41.78 106.1 106.2 248.67 248.29 251.41 42.26 106 106.1 249.05 248.77 251.87 42.59 105.1 106 249.94 249.55 252.24 28.81 101 105.1 253.25 251.4 253.20 6.08 105 105.1 253.08 250.44 253.20 23.79 104 106 250.88 250.66 252.24 5.79 103 107 250.42 249.58 251.34 5.84 128 Cul 254.5 250.86 253.39 17.51 127 128 255.19 255 257.26 1.38 119 128 255.09 254.6 257.26 16.27 133 HW133 247.11 246.73 250.14 10.92 135 HW135 249.83 249.1 252.81 3.85 EXHIBIT C-4 HYDRAULIC GRADE LINE -10Yr. Storm CARTER'S CROSSING PHASES 1 THROUGH 4 Normal Normal Pice Oeoth Startina JeDtl1 Velocitv Velocitv Dia Length Sf PipeS Lower WSElev Upper Hf In Out Hj 42 351 0.155% 0.613% 250.68 253.39 252.83 0.54 6.97 7.88 0.11 36 41 0.327% 0.468% 253.25 254.04 253.45 0.13 6.24 6.97 0.08 36 120 0.256% 0.392% 253.89 254.25 254.36 0.31 6.22 6.24 0.00 30 208.71 0.469% 0.494% 254.86 254.86 255.89 0.96 5.82 6.22 0.04 24 199.11 0.801% 0.583% 255.54 255.93 256.70 1.59 4.57 5.82 0.10 24 45.3 0.246% 0.397% 256.35 257.62 256.53 0.11 0.00 4.57 0.16 18 45.6 0.186% 0.548% 254.61 254.61 254.86 0.08 0.00 4.13 0.13 24 38.67 0.226% 0.646"' 254.94 255.89 255.19 0.09 4.11 5.44 0.10 18 30 0.244% 0.500% 255.50 256.08 255.65 0.07 0.00 4.11 0.13 18 30 0.099'lli 0.833% 254.75 255.89 255.00 0.03 0.00 4.41 0.15 36 147 0.173% 0.578% 253.79 255.28 254.64 0.25 5.74 7.05 0.13 36 30 0.051% 0.500% 254.29 255.66 254.44 0.02 6.35 5.74 0.06 24 312 0.258% 0.939% 254.21 255.74 257.14 0.80 5.32 6.35 0.09 24 30 0.170% 0.667% 257.24 257.24 257.44 0.05 4.22 5.32 0.08 24 455 0.109% 0.420% 257.54 257.54 259.45 0.49 0.00 4.22 0.14 36 40 0.631% 0.775% 250.07 250.56 250.38 0.25 5.47 8.80 0.37 36 30 0.517% 0.300% 250.93 251.18 251.02 0.15 5.50 5.47 0.00 36 23.13 0.334% 0.303% 251.12 251.34 251.19 0.08 5.50 5.50 0.00 36 125.56 0.341% 0.303% 251.29 251.41 251.67 0.43 5.75 5.50 0.02 36 84.54 0.347% 0.331% 251.77 251.87 252.05 0.29 6.59 5.75 0.08 30 70.37 0.420% 0.554% 251.55 252.24 251.94 0.30 11.35 6.59 0.66 18 312.42 0.483% 0.592% 252.41 253.20 254.26 1.51 0.00 4.73 0.17 24 108.64 1.592% 2.430% 251.69 253.20 254.33 1.73 0.00 11.35 1.00 18 38.25 0.439% 0.575% 251.84 252.24 251.86 0.17 0.00 4.63 0.17 18 179.21 0.448% 0.469% 250.63 251.34 251.47 0.80 0.00 4.26 0.14 24 446.15 0.863% 0.816"' 252.31 253.39 255.95 3.85 7.10 6.85 0.03 18 41 0.025% 0.463% 255.45 257.26 255.64 0.01 0.00 2.94 0.07 24 54 0.745% 0.907% 255.95 257.26 256.44 0.40 0.00 7.10 0.39 24 77.48 0.336"' 0.490% 247.98 250.14 248.36 0.26 0.00 5.13 0.20 18 29 0.194% 2.517% 249.59 252.81 250.32 0.06 0.00 7.20 0.40 Endina Too Delta WSElev Inlet Check 254.04 255.2 OK 254.25 255.2 OK 254.56 257.35 OK 255.93 257.89 OK 257.62 259.12 OK 257.90 259.33 OK 254.99 257.56 OK 256.08 258.54 OK 256.28 258.54 OK 256.07 257.89 OK 255.66 258.33 OK 255.74 258.33 OK 257.23 260.98 OK 257.52 261.17 OK 259.59 261.5 OK 251.18 253.32 OK 251.34 253.32 OK 251.41 253.32 OK 251.87 254.3 OK 252.24 254.84 OK 253.20 254.99 OK 254.88 257.39 OK 255.93 259.73 OK 252.57 254.97 OK 252.28 254.37 OK 257.26 259.36 OK 257.34 259.36 OK 258.06 259.52 OK 250.60 251.97 OK 253.27 253.96 Recheck a Main Delta Full Inlet In 1.1611 73.3 168 0.9521 43.4 158 2.7932 38.9 13 1.9630 26.8 9 1.4979 16.1 8 1.4344 13.3 0 2.5674 7.2 0 2.4645 16.9 10 2.2598 6.9 0 1.8193 8.9 0 2.6651 47.2 6 2.5921 43.9 3 3.7459 20.4 2 3.6488 17.2 1 1.9119 13.6 0 2.1393 54.7 107 1.9623 34.0 106.2 1.9051 34.2 106.1 2.4345 34.2 106 2.6013 35.7 105.1 1.7925 28.4 105 2.5093 7.5 0 3.8024 32.8 0 2.3967 7.4 0 2.0915 6.7 0 2.0955 19.0 119 2.0183 6.7 0 1.4624 20.1 0 1.3654 14.8 0 0.7113 15.5 0 7/19/2007 All Phases.Ora-Exhibit C1-CS.xls ExhibltC-4 lnlols FL FL """'n Pioe From To ~ Lower ws Elev 0100 Dia L~ 176 OUT 250.9 248.75 253.81 82.81 42 351 186 176 251 .2 251 255.15 80.27 38 41 156 186 252.11 251.84 255.20 53.27 38 120 13 156 253.39 252.38 255.85 44.23 30 208.71 9 13 255.05 253.89 257.89 24.48 24 199.11 8 9 255.33 255.15 259.12 13.57 24 45.3 146 156 254.11 253.88 255.85 5.49 18 45.8 11 13 254.14 253.89 257.89 13.01 24 38.87 10 11 254.79 254.84 258.19 8.27 18 30 12 13 254.44 254.19 257.89 4.00 18 30 7 OUT 252.91 252.08 255.98 44.23 38 147 8 7 253.16 253.01 258.80 24.01 38 30 3 8 258.19 253.28 258.84 14.04 24 312 2 3 258.49 258.29 258.44 11.39 24 30 1 2 258.5 258.59 258.58 9.09 24 455 108 ffN108 247.83 247.52 251 .00 64.03 38 40 107 108 248.02 247.93 251.91 75.99 38 30 108.2 107 248.19 248.12 252.24 81.08 38 23.13 108.1 108.2 248.87 248.29 252.41 81.74 38 125.58 108 108.1 249.05 248.77 253.34 82.19 38 64.54 105.1 108 249.94 249.55 254.05 42.08 30 70.37 101 105.1 253.25 251.4 254.99 8.82 18 312.42 105 105.1 253.08 250.44 254.99 34.n 24 108.84 104 108 250.88 250.88 254.05 8.41 18 38.25 103 107 250.42 249.58 252.24 8.47 18 179.21 128 Cul 254.5 250.88 253.81 25.93 24 448.15 127 128 255.19 255 259.38 2.00 18 41 119 128 255.09 254.8 259.38 24.10 24 54 133 ffN133 247.11 248.73 250.70 15.85 24 77.48 135 ffN135 249.83 249.1 253.81 5.58 18 29 EXHIBIT C-5 HYDRAULIC GRADE LINE -100Yr. Storm CARTER'S CROSSING PHASES 1 THROUGH 4 1-1 Normal startina r---=-v ........ v ........ Encino Too F...._, Sf PlpeS LOWO< ws Elev '-""-HI In ru Ii WSHead lnlel ws Elev 0.33% 0.81% 251.20 253.81 253.35 1.15 8.98 8.54 0.19 255.15 255.2 255.15 0.89% 0.49"' 254.00 255.15 254.20 0.28 8.25 8.98 O.Q7 255.51 255.2 255.20 0.54% 0.39"' 254.84 255.20 255.11 0.85 8.22 8.25 0.00 255.85 257.35 255.85 0.119% 0.49"' 254.88 255.85 255.89 2.07 5.82 8.22 0.04 257.98 257.89 257.89 1.89% 0.58% 255.89 257.89 257.05 3.38 4.81 5.82 0.08 281.33 259.12 259.12 0.52% 0.40% 258.80 259.12 258.98 0.23 0.00 4.81 0.18 259.53 259.33 259.33 0.39"' 0.55% 254.80 255.85 255.05 0.18 0.00 4.49 0.18 258.19 257.58 258.19 0.48% 0.85% 255.19 257.89 255.44 0.18 4.42 5.92 0.12 258.19 258.54 258.19 0.51% 0.50% 255.73 258.19 255.88 0.15 0.00 4.42 0.15 258.50 258.54 258.50 0.21% 0.83% 254.87 257.89 255.12 0.08 0.00 4.88 0.19 258.14 257.89 257.89 0.37% 0.58% 254.24 255.98 255.09 0.55 8.98 7.57 0.07 258.80 258.33 258.80 0.11% 0.50% 254.59 258.80 254.74 0.03 6.25 6.32 O.Q1 258.84 258.33 258.84 0.55% 0.94% 254.48 258.84 257.39 1.73 6.22 6.98 0.08 258.44 280.98 258.44 0.37% 0.87% 257.44 258.44 257.84 0.11 5.82 5.64 0.00 258.58 281.17 258.58 0.23% 0.42% 257.74 258.58 259.85 1.08 4.81 4.63 O.Q1 259.88 281.5 259.88 1.35% 0.78% 250.52 251.00 250.83 0.54 5.47 8.80 0.37 251.91 253.32 251.91 1.10% 0.30% 250.93 251.91 251.02 0.33 5.50 5.47 0.00 252.24 253.32 252.24 0.71% 0.30% 251.12 252.24 251.19 0.18 5.50 5.50 0.00 252.41 253.32 252.41 0.73% 0.30% 251.29 252.41 251.87 0.91 5.75 5.50 0.02 253.34 254.3 253.34 0.74% 0.33% 251.77 253.34 252.05 0.82 8.59 5.75 0.08 254.05 254.64 254.05 0.89% 0.55% 252.05 254.05 252.44 0.63 11.89 8.59 0.78 255.44 254.99 254.99 1.02% 0.59% 252.90 254.99 254.75 3.18 0.00 4.64 0.18 258.35 257.39 257.39 3.39"' 2.43% 252.14 254.99 254.78 3.89 0.00 11.89 1.10 259.77 259.73 259.73 0.92% 0.58% 252.18 254.05 252.38 0.35 0.00 4.77 0.18 254.58 254.97 254.58 0.94% 0.47% 251.08 252.24 251.92 1.88 0.00 4.31 0.14 254.07 254.37 254.07 1.89% 0.82% 252.88 253.81 258.50 8.45 7.28 8.89 0.04 282.30 259.38 259.38 0.05% 0.46% 255.58 259.38 255.75 0.02 0.00 3.29 0.08 259.47 259.38 259.38 1.83% 0.91% 258.80 259.38 257.09 0.88 0.00 7.28 0.41 280.85 259.52 259.52 0.71% 0.49"' 248.53 250.70 248.91 0.55 0.00 5.34 0.22 251.47 251.97 251.47 0.41% 2.52% 249.70 253.81 250.43 0.12 0.00 7.99 0.50 254.42 253.98 253.98 Deb Q -a.tel< Deb &.face 'l\llclh 5u'cha1119 0.05 0.00 27 5u'charae -0.31 12.14 27 OK 1.50 0.00 27 ~~--0.07 5.04 27 ~--2.21 0.23 27 ~~--0.20 0.00 27 OK 1.37 0.00 27 5u'charao 0.35 0.00 27 5u'charae 0.04 0.00 27 5u'challl0 -0.25 0.00 27 OK 1.73 0.00 27 OK 1.89 0.00 27 OK 2.54 0.00 27 OK 2.81 0.00 27 OK 1.64 0.00 27 OK 1.41 0.00 27 OK 1.08 0.00 27 OK 0.91 0.00 27 OK 0.98 0.00 27 OK 0.79 0.00 27 5u'challl0 -0.45 0.00 27 5u'charae -0.98 0.00 27 5u'challl0 -0.04 0.39 27 5u'chan>e 0.39 0.00 27 5u'charao 0.30 0.00 27 5u'cha""' -2.94 0.00 38 5u'challl0 -0.11 0.00 38 Su-charae -1.13 0.00 27 OK 0.50 0.00 27 Su-chamo -0.44 0.00 27 -""""' 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.85% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% Rc:YW Moin canadlY lnlel In 80.54 186 80.54 156 80.54 13 80.54 9 80.54 8 80.54 0 80.54 0 80.54 10 80.54 0 80.54 0 80.54 186 80.54 156 80.54 13 80.54 9 80.54 8 58.18 107 58.16 108.2 58.16 108.1 58.18 108 58.18 105.1 58.18 105 58.18 0 58.18 0 58.18 0 58.18 0 80.07 119 80.07 0 58.18 0 58.18 0 58.18 0 7/19f2007 M Pha....n-E>Chlbit C1-C5.lds ElctibitC-5 Drainage Report EXHIBITD-1 (HEC-HMS PRE-DEVELOPMENT) Carter's Crossing Subdivision Phases 1 through 4 Project: 10150006-Pre Simulation Run: 5 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run : 31Jan2007, 00:30 Meteorologic Model: 5 Year Compute Time: 19Jul2007, 11 : 11 :28 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 154.42 30Jan2007, 12:40 4.33 Junction-2 0.1847 208.56 30Jan2007, 12:40 4.30 Junction-3 0.2109 235.21 30Jan2007, 12:45 4.26 Subbasin-1 0.0810 86.41 30Jan2007, 12:55 4.40 Subbasin-2 0.0582 77.70 30Jan2007, 12:35 4.22 Subbasin-3 0.0455 54.69 30Jan2007, 12:45 4.23 Subbasin-4 0.0262 27.60 30Jan2007, 12:50 3.99 Project: 10150006-Pre Simulation Run: 10 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 10 Year Compute Time: 19Jul2007, 11: 11 : 19 Control Specifications: Control 1 Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 203.63 30Jan2007, 12:40 5.71 Junction-2 0.1847 275.31 30Jan2007, 12:40 5.69 Junction-3 0.2109 310.53 30Jan2007, 12:45 5.65 Subbasin-1 0.0810 113.36 30Jan2007, 12:55 5.79 Subbasin-2 0.0582 102.70 30Jan2007, 12:35 5.59 Subbasin-3 0.0455 72.21 30Jan2007, 12:45 5.64 Subbasin-4 0.0262 36.94 30Jan2007, 12:50 5.37 Project: 10150006-Pre Simulation Run : 25 year Start of Run : 30Jan2007, 00:00 Basin Model: Basin 1 End of Run : 31Jan2007, 00:30 Meteorologic Model: 25 Year Compute Time: 19Jul2007, 11: 11 :22 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 240.13 30Jan2007, 12:40 6.74 Junction-2 0.1847 324.68 30Jan2007, 12:40 6.72 Junction-3 0.2109 366.30 30Jan2007, 12:40 6.68 Subbasin-1 0.0810 133.30 30Jan2007, 12:55 6.83 Subbasin-2 0.0582 121 .27 30Jan2007, 12:35 6.61 Subbasin-3 0.0455 85 .06 30Jan2007, 12:45 6.69 Subbasin-4 0.0262 43.83 30Jan2007, 12:50 6.40 Project: 10150006-Pre Simulation Run: 50 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 50 Year Compute Time: 19Jul2007, 11: 11 :26 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 273.47 30Jan2007, 12:40 7.68 Junction-2 0.1847 369.69 30Jan2007, 12:40 7.67 Junction-3 0.2109 417.36 30Jan2007, 12:40 7.63 Subbasin-1 0.0810 151 .53 30Jan2007, 12:50 7.78 Subbasin-2 0.0582 138.23 30Jan2007, 12:35 7.55 Subbasin-3 0.0455 96.72 30Jan2007, 12:45 7.65 Subbasin-4 0.0262 50.08 30Jan2007, 12:50 7.35 Project: 10150006-Pre Simulation Run: 100 year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 100 Year Compute Time: 19Jul2007, 11 : 11 : 16 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 313.58 30Jan2007, 12:40 8.83 Junction-2 0.1847 423.78 30Jan2007, 12:40 8.82 Junction-3 0.2109 478.70 30Jan2007, 12:40 8.78 Subbasin-1 0.0810 173.49 30Jan2007, 12:50 8.93 Subbasin-2 0.0582 158.66 30Jan2007, 12:35 8.69 Subbasin-3 0.0455 110.67 30Jan2007, 12:45 8.81 Subbasin-4 0.0262 57.58 30Jan2007, 12:50 8.50 Drainage Report EXHIBITD-2 (HEC-HMS POST-DEVELOPMENT) Carter's Crossing Subdivision Phases 1 through 4 Project: 10150006-Post Simulation Run: 5 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 5 Year Compute Time: 19Jul2007, 11 :09:32 Control Specifications: Control 1 I Volume Units: IN Hydro logic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 161 .47 30Jan2007, 12:40 4.53 Junction-2 0.1 847 218.71 30Jan2007, 12:45 4.54 Junction-3 0.2109 247.81 30Jan2007, 12:45 4.48 Subbasin-1 0.0810 86.41 30Jan2007, 12:55 4.40 Subbasin-2 0.0582 83.64 30Jan2007, 12:35 4.70 Subbasin-3 0.0455 57.44 30Jan2007, 12:45 4.60 Subbasin-4 0.0262 29.09 30Jan2007, 12:45 3.99 Project: 10150006-Post Simulation Run: 10 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run : 31 Jan2007, 00:30 Meteorologic Model: 1 O Year Compute Time: 19Jul2007, 11 :09:23 Control Specifications: Control 1 J Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 210.96 30Jan2007, 12:40 5.93 Junction-2 0.1847 285.06 30Jan2007, 12:45 5.95 Junction-3 0.2109 324.01 30Jan2007, 12:45 5.88 Subbasin-1 0.0810 113.36 30Jan2007, 12:55 5.79 Subbasin-2 0.0582 108.51 30Jan2007, 12:35 6.12 Subbasin-3 0.0455 74.60 30Jan2007, 12:45 6.03 Subbasin-4 0.0262 38.95 30Jan2007, 12:45 5.37 Project: 10150006-Post Simulation Run: 25 year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 25 Year Compute Time: 19Jul2007, 11 :09:26 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 247.51 30Jan2007, 12:40 6.97 Junction-2 0.1847 333.89 30Jan2007, 12:45 7.00 Junction-3 0.2109 380.10 30Jan2007, 12:45 6.93 Subbasin-1 0.0810 133.30 30Jan2007, 12:55 6.83 Subbasin-2 0.0582 126.79 30Jan2007, 12:35 7.18 Subbasin-3 0.0455 87.14 30Jan2007, 12:45 7.10 Subbasin-4 0.0262 46.21 30Jan2007, 12:45 6.41 Project: 10150006-Post Simulation Run : 50 Year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run: 31Jan2007, 00:30 Meteorologic Model: 50 Year Compute Time: 19Jul2007, 11 :09:29 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 280.80 30Jan2007, 12:40 7.93 Junction-2 0.1847 378.31 30Jan2007, 12:45 7.97 Junction-3 0.2109 431 .11 30Jan2007, 12:45 7.89 Subbasin-1 0.0810 151 .53 30Jan2007, 12:50 7.78 Subbasin-2 0.0582 143.41 30Jan2007, 12:35 8.14 Subbasin-3 0.0455 98.49 30Jan2007, 12:45 8.07 Subbasin-4 0.0262 52.81 30Jan2007, 12:45 7.36 Project: 10150006-Post Simulation Run: 100 year Start of Run: 30Jan2007, 00:00 Basin Model: Basin 1 End of Run : 31 Jan2007, 00:30 Meteorologic Model: 100 Year Compute Time: 19Jul2007, 11 :09:36 Control Specifications: Control 1 I Volume Units: IN Hydrologic Drainage Area Peak Discharge Time of Peak Volume Element (Ml2) (CFS) (IN) Junction-1 0.1392 320.79 30Jan2007, 12:40 9.09 Junction-2 0.1847 431 .57 30Jan2007, 12:45 9.13 Junction-3 0.2109 492.28 30Jan2007, 12:45 9.05 Subbasin-1 0.0810 173.49 30Jan2007, 12:50 8.93 Subbasin-2 0.0582 163.34 30Jan2007, 12:35 9.31 Subbasin-3 0.0455 112.06 30Jan2007, 12:45 9.24 Subbasin-4 0.0262 60.72 30Jan2007, 12:45 8.50 General ~ rJ:J h 8 ~ > ~~ fil < < ~< ~~ ~ ~~ ~~ 3~ # ACRES ACRES ACRES DA 1 pre 38.67 13.50 0.00 DA2pre 29.88 1.30 0.00 DA3 pre 10.10 0.00 0.00 DA4pre 9.10 0.00 0.00 DA 1 post 38.67 13.50 0.00 DA 2 post 11.30 1.30 0.00 DA 3 post 1.87 0.00 0.00 DA4 post 9.10 0.00 0.00 Exhibit D-3 Drainage Area Parameters :;; ~~ g ~ ..... rJ:J u -~ b z ~~ ..._< ~ ~~ ... ... 08 rJ:J = (/) ~ :::i < < ~ ffi ~ s rJ:J ~ ~ ~ ~~ ;::::> 0 Q~ i:Q u ACRES ACRES ACRES ACRES ACRES MILES 0.00 0.00 0.00 0.00 52.17 0.0815 6.05 0.00 0.00 0.00 37.23 0.0582 19.00 0.00 0.00 0.00 29.10 0.0455 7.67 0.00 0.00 0.00 16.77 0.0262 0.00 0.00 0.00 0.00 52.17 0.0815 24.64 0.00 0.00 0.00 37.24 0.0582 27.23 0.00 0.00 0.00 29.10 0.0455 7.67 0.00 0.00 0.00 16.77 0.0262 ~ ~ ~ ...:l rJ:J LENGTH DROP Ff/Ff 2492 17 0.007 1576 15 0.010 2450 19 0.008 2241 19 0.008 2492 17 0.007 1576 15 0.010 2450 19 0.008 2241 19 0.008 Existing Cond. PLAN I ~ # 80.2 77.6 82.8 80.5 80.2 83.6 86.2 80.5 0 < ...:l HOURS 0.79 0.50 0.67 0.65 0.79 0.42 0.60 0.65 Exhibit D-3 Drainage Area Parameters 1000-0072 lag-new.xis EXHIBIT E Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 1930 Profile: PF 2 E.G. Elev (ft) 255.74 Element Left OB Channel Right OB Vel Head (ft) 0.05 Wt. n-Val. 0.075 0.05 0.075 W.S. Elev (ft) 255.69 Reach Len. (ft) 655 655 655 Crit W.S. (ft) Flow Area (sq ft) 154.2 76.39 66.79 E.G. Slope (ft/ft) 0.000736 Area (sq ft) 154.2 76.39 66.79 Q Total (cfs) 314 Flow (cfs) 111 .43 175.03 27.54 Top Width (ft) 212.71 Top Width (ft) 98.77 15 98.94 Vet Total (ft/s) 1.06 Avg. Vet. (ft/s) 0.72 2.29 0.41 Max Chi Dpth (ft) 5.69 Hvdr. Depth (ft) 1.56 5.09 0.68 Conv. Total (cfs) 11578 Conv. (cfs) 4108.9 6453.6 1015.5 Length Wtd. (ft) 655 Wetted Per. (ft) 98.86 15.94 99.36 Min Ch El (ft) 250 Shear (lb/sq ft) 0.07 0.22 0.03 Alpha 2.8 Stream Power (lb/ft s) 0.05 0.5 0.01 Frctn Loss (ft) 0.6 Cum Volume (acre-ft) 4.37 5.51 2.53 C & E Loss (ft) 0 Cum SA (acres) 4.15 2.34 3.54 Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 1275 Profile: PF 1 E.G. Elev (ft) 251.59 Element Left OB Channel Right OB Vet Head (ft) 0.13 Wt. n-Val. 0.075 0.05 0.075 W.S. Elev (ft) 251.46 Reach Len. (ft) 309 309 309 Crit W.S. (ft) Flow Area (sq ft) 94 80.8 34.11 E.G. Slope (ft/ft} 0.003936 Area (sq ft) 94 80.8 34.11 Q Total (cfs} 420 Flow (cfs) 109.95 276.98 33.07 Top Width (ft) 184.43 Top Width (ft) 102.94 32 49.5 Vet Total (ft/s) 2.01 Avg. Vet. (ft/s) 1.17 3.43 0.97 Max Chi Dpth (ft) 3.46 Hydr. Depth (ft) 0.91 2.52 0.69 Conv. Total (cfs) 6694.8 Conv. (cfs) 1752.6 4415.1 527.2 Length Wtd. (ft) 309 Wetted Per. (ft) 102.96 32.41 49.52 Min Ch El (ft) 248 Shear (lb/sq ft) 0.22 0.61 0.17 Alpha 2.02 Stream Power (lb/ft s) 0.26 2.1 0.16 Frctn Loss (ft) 1.08 Cum Volume (acre-ft) 1.68 3.08 1.59 C & E Loss (ft) 0.01 Cum SA (acres) 1.91 1.69 2.28 Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 1275 Profile: PF 2 E.G. Elev (ft) 251.62 Element Vel Head (ft) 0.13 Wt. n-Val. W.S. Elev (ft) 251 .49 Reach Len. (ft} Crit W .S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) 0.003913 Area (sq ft) Q Total (cfs) 432 Flow (cfs) Top Width (ft) 186.1 Top Width (ft) Vet Total (ft/s) 2.01 Avg. Vet. (ft/s) Max Chi Dpth (ft} 3.49 Hydr. Depth (ft) Conv. Total (cfs) 6906.3 Conv. (cfs) Length Wtd. (ft) 309 Wetted Per. (ft) Min Ch El (ft) 248 Shear (lb/sq ft) Alpha 2.02 Stream Power (lb/ft s} Frctn Loss (ft) 1.08 Cum Volume (acre-ft) C & E Loss (ft) 0.01 Cum SA (acres) Left OB Channel Right OB 0.075 0.05 0.075 309 309 309 97.11 81.76 35.63 97.11 81.76 35.63 115.42 281.7 34.88 103.39 32 50.71 1.19 3.45 0.98 0.94 2.56 0.7 1845.1 4503.5 557.7 103.41 32.41 50.73 0.23 0.62 0.17 0.27 2.12 0.17 1.72 3.12 1.62 1.92 1.7 2.3 EXHIBIT E 7/19/2007 HECRAS-Cross Section-Output.xis EXHIBIT E Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 2550 Profile: PF 1 E.G. Elev (ft) 258.63 Element Left OB Channel Right OB Vel Head (ft) 0.78 Wt. n-Val. 0.075 0.05 0.075 W .S. Elev (ft) 257.85 Reach Len. (ft) 238 238 238 Crit W.S. (ft) 257.85 Flow Area (sq ft) 1.44 23.54 1.08 E.G. Slope (ft/ft) 0.028324 Area (sq ft) 1.44 23.54 1.08 Q Total (cfs) 174 Flow (cfs) 2.66 169.37 1.97 Top Width (ft) 18.95 Top Width (ft) 3.4 13 2.55 Vel Total (ft/s) 6.68 Avg. Vel. (ft/s) 1.85 7.19 1.82 Max Chi Dpth (ft) 2.85 Hydr. Depth (ft) 0.42 1.81 0.42 Conv. Total (cfs) 1033.9 Conv. (cfs) 15.8 1006.4 11 .7 Length Wtd. (ft) 238 Wetted Per. (ft) 3.5 13.64 2.69 Min Ch El (ft) 255 Shear (lb/sq ft) 0.73 3.05 0.71 Alpha 1.13 Stream Power (lb/ft s) 1.34 21.95 1.3 Frctn Loss (ft) 1.67 Cum Volume (acre-ft) 5.01 6.1 2.97 C & E Loss (ft) 0.19 Cum SA (acres) 4.65 2.5 4.19 Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 2550 Profile: PF 2 E.G. Elev (ft) 258.63 Element Left OB Channel Right OB Vel Head (ft) 0.78 Wt. n-Val. 0.075 0.05 0.075 W.S. Elev (ft) 257.85 Reach Len. (ft) 238 238 238 Crit W.S. (ft) 257.85 Flow Area (sq ft) 1.44 23.54 1.08 E.G. Slope (ft/ft) 0.028324 Area (sq ft) 1.44 23.54 1.08 Q Total (cfs) 174 Flow (cfs) 2.66 169.37 1.97 Top Width (ft) 18.95 Top Width (ft) 3.4 13 2.55 Vel Total (ft/s) 6.68 Avg. Vel. (ft/s) 1.85 7.19 1.82 Max Chi Dpth (ft) 2.85 Hydr. Depth (ft) 0.42 1.81 0.42 Conv. Total (cfs) 1033.9 Conv. (cfs) 15.8 1006.4 11 .7 Length Wtd. (ft) 238 Wetted Per. (ft) 3.5 13.64 2.69 Min Ch El (ft) 255 Shear (lb/sq ft) 0.73 3.05 0.71 Alpha 1.13 Stream Power (lb/ft s) 1.34 21.95 1.3 Frctn Loss (ft) 1.63 Cum Volume (acre-ft) 5.15 6.17 3.06 C & E Loss (ft) 0.19 Cum SA (acres) 4.68 2.51 4.25 Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 1930 Profile: PF 1 E.G. Elev (ft) 255.71 Element Vel Head (ft) 0.05 Wt. n-Val. W.S. Elev (ft) 255.66 Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) 0.000746 Area (sq ft) Q Total (cfs) 310 Flow (cfs) Top Width (ft} 208.67 Top Width (ft) Vel Total (ft/s) 1.07 Avg. Vel. (ft/s) Max Chi Dpth (ft) 5.66 Hydr. Depth (ft) Conv. Total (cfs) 11349.4 Conv. (cfs) Length Wtd. (ft) 655 Wetted Per. (ft) Min Ch El (ft) 250 Shear (lb/sq ft) Alpha 2.79 Stream Power (lb/ft s) Frctn Loss (ft) 0.61 Cum Volume (acre-ft) C & E Loss (ft) 0 Cum SA (acres) Left OB Channel Right OB 0.075 0.05 0.075 655 655 655 151 .17 75.92 63.79 151 .17 75.92 63.79 109.26 174.5 26.24 97.85 15 95.82 0.72 2.3 0.41 1.54 5.06 0.67 4000.1 6388.6 960.7 97.94 15.94 96.24 0.07 0.22 0.03 0.05 0.51 0.01 4.25 5.45 2.46 4.1 3 2.33 3.5 EXHIBIT E 7/19/2007 HECRAS-Cross Section-Output.xis EXHIBIT E Plan: Plan 01 River: Carter's Creek T Reach:CCT Riv Sta: 300 Profile: PF 1 E.G. Elev (ft) 246.2 Element Left OB Channel Right OB Vel Head (ft) 0.04 Wt. n-Val. 0.05 W .S. Elev (ft) 246.15 Reach Len. (ft) 300 300 300 Crit W.S. (ft) 244.88 Flow Area (sq ft) 291.5 E.G. Slope (ft/ft) 0.001637 Area (sq ft) 291.5 Q Total (cfs) 482 Flow (cfs) 482 Top Width (ft) 180.23 Top Width (ft) 180.23 Vel Total (ft/s) 1.65 Avg. Vel. (ft/s) 1.65 Max Chi Dpth (ft) 3.2 Hydr. Depth (ft) 1.62 Conv. Total (cfs) 11913.5 Conv. (cfs) 11914 LenQth Wtd. (ft) 300 Wetted Per. (ft) 180.74 Min Ch El (ft) 242.95 Shear (lb/sq ft) 0.16 Alpha 1 Stream Power (lb/ft s) 0.27 Frctn Loss (ft) 1.23 Cum Volume (acre-ft) 0.07 1.18 0.43 C & E Loss (ft) 0.02 Cum SA (acres) 0.19 0.78 1.19 Plan· Plan 01 River· Carter's Creek T Reach·CCT Riv Sta: 300 Profile: PF 2 . . . E.G. Elev (ft) 246.22 Element Vel Head (ft) 0.04 Wt. n-Val. W.S. Elev (ft) 246.18 Reach Len. (ft) Crit W.S. (ft) 244.89 Flow Area (sq ft) E.G. Slope (ft/ft) 0.001646 Area (sq ft) Q Total (cfs) 494 Flow (cfs) Top Width (ft) 181.26 Top Width (ft) Vel Total (ft/s) 1.67 Avg. Vel. (ft/s) Max Chi Dpth (ft) 3.23 Hydr. Depth (ft) Conv. Total (cfs) 12176.5 Conv. (cfs) Length Wtd. (ft) 300 Wetted Per. (ft) Min Ch El (ft} 242.95 Shear (lb/sq ft) Alpha 1 Stream Power (lb/ft s) Frctn Loss (ft) 1.25 Cum Volume (acre-ft) C & E Loss (ft) 0.02 Cum SA (acres) Left OB Channel Right OB 0.05 300 300 300 296.02 296.02 494 181.26 1.67 1.63 12177 181 .78 0.17 0.28 0.07 1.19 0.44 0.19 0.78 1.19 EXHIBIT E 7/19/2007 HECRAS-Cross Section-Output.xis April 27, 2006 Mr. Lance Sims, Assistant Director Planning and Development Services CITY OF COLLEGE STATION P.O. Box 9960 College Station, TX 77842 RE: Carters Crossing Subdivision Dear Mr. Sims: Please be advised that I approve of the proposed drainage plan for the Carter's Crossing 4 7. 73 7 acre subdivision. The property outfalls into an un-named tributary of Carter's Creek near the south comer of my 20.69 acre tract. I understand that the un-detained peak run-off from the proposed development will result in approximately a 0.08 foot (one inch) increase in the water surface elevation of the Base Flood as it enters my property. Patricia Guseman EXHIBIT F-1