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HomeMy WebLinkAboutAppendix G2 - Drainage Report❖ APPENDICES ❖ APPENDIX G2 Drainage Report APN: 0240-011-17 Fontana, CA Preliminary Drainage Report Citrus Avenue and South Highland Avenue November 4, 2021 Prepared For: PRL, LLC 16866 Seville Avenue Fontana, CA 92335 Tel.: (909) 356-1815 Prepared By: Allard Engineering 16866 Seville Avenue Fontana, CA 92335 (909) 356-1815 Prepared under the supervision of: _____________________________________ Robert K Allard, P.E. RCE 85349 Exp. 06-30-22 16866 Seville Avenue Fontana, CA 92335 (909) 356-1815 * (909) 356-1795 Table of Contents Discussion Introduction Purpose Criteria Findings Reference Material Google Earth Existing Site Map Master Strom Drain Plan (Enlarged), City of Fontana NOAA Atlas 14, Point Precipitation Data Site Soil Data: USDA Web Soil Survey San Bernardino County-WAP: WQMP Project Report City of Fontana Storm Drain Improvement Plan City of Fontana Master Storm Drain Plan Hydrology Calculation Rational Method Hydrology Analysis-Developed Condition Rational Method Hydrology Analysis-Pre-developed Condition Hydraulic Calculation Hydraulic Analysis: 24” SD Lateral Capacity Calc Hydraulic Analysis: 48” SD Existing Master Storm Drain Capacity Calc Drainage Exhibits Drainage Exhibit-Developed Condition Drainage Exhibit-Pre-developed Condition Discussion Introduction This report is for the proposed 4.63 acres of detached and attached residential development of 70 lots located in the City of Fontana at the corner of Citrus Avenue and South Highland Avenue. This site is vacant and in barren (Open Brush-poor) condition. The current runoff, which occurs during storm events, drains westerly to Citrus Avenue, which is tributary to the Walnut Avenue master storm drain system (60” RCP, Line D2). Purpose The purpose of this Drainage Report is to assess the existing and future flows that affect the site and provide necessary onsite drainage facilities to safely convey the peak flow generated from the proposed development into the existing 48”RCP master storm drain system in Citrus Avenuewhich is tributary to the Walnut Avenue master storm drain system (60” RCP, Line D2). The purpose of this Drainage Report is to quantify the developed condition runoff and show that the proposed drainage system is adequate to drain onsite water into the proposed future 48” RCP (Per the City of Fontana Storm Drain Improvement Plans to be built by the property developer) in Citrus Avenue. Criteria The criteria utilized for hydrologic analysis is the San Bernardino County Hydrology Manual. Rational Method Hydrology was used for 100-year, 1-hour duration storm event (1.72”/hr) and soil group ‘A’ to quantify flows, and AES software we used to size the proposed storm drain and swales/valley gutters to carry the flow. Findings The proposed new development will consist of 70 lots detached and attached single family residential lots with driveways, private road, sidewalks, paved areas and landscape area. The pre- developed site is vacant and barren (Open Brush-poor) and 100% of pervious cover. The flow generated from pre-developed condition was calculated as 13.6 CFS from the entire site (4.63 acres). There is no run-on from adjacent property (ies) that can impact the site in existing condition. In proposed developed condition, we have estimated the new development will create impervious area of 80% of the site area and the site will be 20% pervious. The flow generated from the proposed developed condition was calculated as 19.0 CFS from the entire site (4.63 acres). Also there is no run-on from adjacent property (ies) that can impact the site in its redeveloped condition. From a drainage perspective, the onsite runoff will flow into grate inlets/catch basins via proposed gutters and storm drains and then into the proposed onsite Contech Chamber System- 1,2 for low flow retention and infiltration for WQ volume.For larger storm events, flows will overflow the Contech infiltration/retention chamber system-1,2, drains to the proposed manhole at the southwest corner of the site via storm drain and discharge via proposed 24”RCP lateral which will tie in to the existing 48”RCP master storm drain system in Citrus Avenue. For emergency overflow, storm water will drain on surface within the right of way and then discharge at the southwest corner of the site to the frontal street gutter in Citrus Avenue via proposed parkway drain which is tributary to the Walnut Avenue master storm drain system (60” RCP, Line D2). The proposed new development site is consistent with drainage pattern in the area. It flows to the existing 48”RCP master storm drain system in Citrus Avenue which ultimately drains to existing master storm drain system (60” RCP, Line D2) in Walnut Avenue. Also the proposed Contech Chamber System-1,2 will substantially attenuated the runoff flow rate in developed condition by retention/infiltration of low flow and will discharge to its existing condition. Calculations and exhibits are attached to support these findings. Date: Project Name: City / County: State: Designed By: Company: Telephone: Storage Volume Required (cf):13,326 Limiting Width (ft):104.00 0.00 Solid or Perforated Pipe:Perforated Shape Or Diameter (in):60 19.63 ft2 Pipe Area Number Of Headers:2 Spacing between Barrels (ft):2.00 Stone Width Around Perimeter of System (ft):1 Depth A: Porous Stone Above Pipe (in):1 Depth C: Porous Stone Below Pipe (in):1 Stone Porosity (0 to 40%):40 System Sizing Pipe Storage:10,642 cf Porous Stone Storage:3,242 cf 13,884 cf 104.2%Of Required Storage Barrel 12 14 barrels Barrel 11 Length per Barrel:25.0 ft Barrel 10 Length Per Header:96.0 ft Barrel 9 Rectangular Footprint (W x L):98. ft x 37. ft Barrel 8 CONTECH Materials Barrel 7 Total CMP Footage:542 ft Barrel 6 Approximate Total Pieces:36 pcs Barrel 5 Approximate Coupling Bands:48 bands Barrel 4 Approximate Truckloads:9 trucks Barrel 3 Construction Quantities**Barrel 2 Total Excavation:0 cy Barrel 1 Porous Stone Backfill For Storage:300 cy stone Backfill to Grade Excluding Stone:-694 cy fill **Construction quantities are approximate and should be verified upon final design Total Storage Provided: Number of Barrels: Invert Depth Below Asphalt (ft): 11/30/2021 Corrugated Metal Pipe Calculator Enter Information in Blue Cells(909) 356-1815 System Layout Number Of Barrels Exceed Graph Limitations PRL, CITRUS AVE SAN BERNARDINO Allard Engineering California Adam Project Summary 25 25 25 25 25 25 25 25 25 25 25 25 Barrel Footage (w/o headers) For design assistance, drawings, and pricing send completed worksheet to: dyods@contech-cpi.com © 2007 CONTECH Stormwater Solutions Date: Project Name: City / County: State: Designed By: Company: Telephone: Storage Volume Required (cf):9,000 Limiting Width (ft):6.00 0.00 Solid or Perforated Pipe:Perforated Shape Or Diameter (in):48 12.57 ft2 Pipe Area Number Of Headers:2 Spacing between Barrels (ft):0.00 Stone Width Around Perimeter of System (ft):0.5 Depth A: Porous Stone Above Pipe (in):1 Depth C: Porous Stone Below Pipe (in):1 Stone Porosity (0 to 40%):40 System Sizing Pipe Storage:7,125 cf Porous Stone Storage:1,887 cf 9,012 cf 100.1%Of Required Storage Barrel 12 1 barrels Barrel 11 Length per Barrel:559.0 ft Barrel 10 Length Per Header:4.0 ft Barrel 9 Rectangular Footprint (W x L):5. ft x 568. ft Barrel 8 CONTECH Materials Barrel 7 Total CMP Footage:567 ft Barrel 6 Approximate Total Pieces:26 pcs Barrel 5 Approximate Coupling Bands:25 bands Barrel 4 Approximate Truckloads:4 trucks Barrel 3 Construction Quantities**Barrel 2 Total Excavation:0 cy Barrel 1 Porous Stone Backfill For Storage:175 cy stone Backfill to Grade Excluding Stone:-439 cy fill **Construction quantities are approximate and should be verified upon final design Total Storage Provided: Number of Barrels: Invert Depth Below Asphalt (ft): 11/30/2021 Corrugated Metal Pipe Calculator Enter Information in Blue Cells(909) 356-1815 System Layout Number Of Barrels Exceed Graph Limitations PRL, CITRUS AVE SAN BERNARDINO Allard Engineering California Adam Project Summary 559 0 0 0 0 0 0 0 0 0 0 0 Barrel Footage (w/o headers) For design assistance, drawings, and pricing send completed worksheet to: dyods@contech-cpi.com © 2007 CONTECH Stormwater Solutions 400 ft N➤➤N © 2021 Google © 2021 Google © 2021 Google WQMP Project Report County of San Bernardino Stormwater Program Santa Ana River Watershed Geodatabase Thursday, September 02, 2021 Note: The information provided in this report and on the Stormwater Geodatabase for the County of San Bernardino Stormwater Program is intended to provide basic guidance in the preparation of the applicant’s Water Quality Management Plan (WQMP) and should not be relied upon without independent verification. Project Site Parcel Number(s):024001117 Project Site Acreage:4.32 HCOC Exempt Area:Yes. Verify that the project is completely with the HCOC exemption area. Closest Receiving Waters: (Applicant to verify based on local drainage facilities and topography.) System Number - 812 Facility Name - Highland Channel Owner - SBCFCD Closest channel segment’s susceptibility to Hydromodification:EHM Highest downstream hydromodification susceptibility:EHM Is this drainage segment subject to TMDLs?No Are there downstream drainage segments subject to TMDLs?No Is this drainage segment a 303d listed stream?No Are there 303d listed streams downstream?No Are there unlined downstream waterbodies?No Project Site Onsite Soil Group(s):A Environmentally Sensitive Areas within 200':None Groundwater Depth (FT):-659 Parcels with potential septic tanks within 1000':Yes Known Groundwater Contamination Plumes within 1000':No Studies and Reports Related to Project Site:Chino Basin Recharge Master Plan Chino Basin Water Master 32nd Annual Report Cactus Basin Summary Report Master Storm Drainage Plan StudySummary Report Master Storm Drainage Plan Map FONTANA MPD FEE STUDY Master SD Hydrology Calcs for Fontana Vol III Master SD Hydrology Calcs For Fontana Vol IIMaster SD Hydrology Calcs for Fontana Vol V Master SD Hydrology Calcs for Fontana Vol IV San Sevaine - Boyle Map 0001 San Sevaine - Boyle Map 0002 San Sevaine - Boyle Map 0003 SBCounty CSDP Project No.2 Volume 1 SBCounty CSDP Project No.2 Volume 2Volume 2 Map SBCounty CSDP Project No.3 Volume I SBCounty CSDP Project No.3 Volume IIWest Fontana Channel Preliminary Basin Study Page 1 of 1San Bernardino -WAP Report 9/2/2021http://permitrack.sbcounty.gov/wap_report/report.asp?septic=Yes&SECAREA=&PNUM=0... Soil Map—San Bernardino County Southwestern Part, California Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/8/2021 Page 1 of 33776870377689037769103776930377695037769703776990377701037768703776890377691037769303776950377697037769903777010458180458200458220458240458260458280458300458320458340458360458380458400 458180 458200 458220 458240 458260 458280 458300 458320 458340 458360 458380 458400 34° 7' 59'' N 117° 27' 12'' W34° 7' 59'' N117° 27' 3'' W34° 7' 54'' N 117° 27' 12'' W34° 7' 54'' N 117° 27' 3'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,070 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. San Bernardino County Southwestern Part, California TvC—Tujunga gravelly loamy sand, 0 to 9 percent slopes Map Unit Setting National map unit symbol: hcl2 Elevation: 10 to 1,500 feet Mean annual precipitation: 10 to 25 inches Mean annual air temperature: 59 to 64 degrees F Frost-free period: 250 to 350 days Farmland classification: Not prime farmland Map Unit Composition Tujunga and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Tujunga Setting Landform:Alluvial fans Landform position (two-dimensional):Backslope Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Parent material:Alluvium derived from granite Typical profile H1 - 0 to 36 inches: gravelly loamy sand H2 - 36 to 60 inches: gravelly sand Properties and qualities Slope:0 to 9 percent Depth to restrictive feature:More than 80 inches Drainage class:Somewhat excessively drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat):High to very high (5.95 to 19.98 in/hr) Depth to water table:More than 80 inches Frequency of flooding:Rare Frequency of ponding:None Available water supply, 0 to 60 inches: Low (about 3.8 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Hydric soil rating: No Map Unit Description: Tujunga gravelly loamy sand, 0 to 9 percent slopes---San Bernardino County Southwestern Part, California Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/8/2021 Page 1 of 2 Minor Components Unnamed Percent of map unit:5 percent Landform:Drainageways Hydric soil rating: Yes Soboba, gravelly loamy sand Percent of map unit:5 percent Hydric soil rating: No Delhi, fine sand Percent of map unit:5 percent Hydric soil rating: No Data Source Information Soil Survey Area: San Bernardino County Southwestern Part, California Survey Area Data: Version 12, May 27, 2020 Map Unit Description: Tujunga gravelly loamy sand, 0 to 9 percent slopes---San Bernardino County Southwestern Part, California Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/8/2021 Page 2 of 2 MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: San Bernardino County Southwestern Part, California Survey Area Data: Version 12, May 27, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Apr 1, 2018—Jun 30, 2018 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—San Bernardino County Southwestern Part, California Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/8/2021 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI TvC Tujunga gravelly loamy sand, 0 to 9 percent slopes 4.2 100.0% Totals for Area of Interest 4.2 100.0% Soil Map—San Bernardino County Southwestern Part, California Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/8/2021 Page 3 of 3 SITE ____________________________________________________________________________ **************************************************************************** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) (c) Copyright 1983-2016 Advanced Engineering Software (aes) Ver. 23.0 Release Date: 07/01/2016 License ID 1400 Analysis prepared by: ************************** DESCRIPTION OF STUDY ************************** * PRL-CITRUS AVE * * 100-YR STORM EVENT * * DEVELOPED CONDITION * ************************************************************************** FILE NAME: PRL.DAT TIME/DATE OF STUDY: 14:24 09/09/2021 ============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ============================================================================ --*TIME-OF-CONCENTRATION MODEL*-- USER SPECIFIED STORM EVENT(YEAR) = 100.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *USER-DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* SLOPE OF INTENSITY DURATION CURVE(LOG(I;IN/HR) vs. LOG(Tc;MIN)) = 0.6000 USER SPECIFIED 1-HOUR INTENSITY(INCH/HOUR) = 1.7200 *ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS: 1. Relative Flow-Depth = 0.00 FEET as (Maximum Allowable Street Flow Depth) - (Top-of-Curb) 2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S) *SIZE PIPE WITH A FLOW CAPACITY GREATER THAN OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.* *USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 0.00 TO NODE 1.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< >>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 732.00 ELEVATION DATA: UPSTREAM(FEET) = 1487.00 DOWNSTREAM(FEET) = 1479.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 11.185 * 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.712 SUBAREA Tc AND LOSS RATE DATA(AMC III): DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.) RESIDENTIAL "11+ DWELLINGS/ACRE" A 4.63 0.74 0.200 52 11.18 SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.74 SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200 SUBAREA RUNOFF(CFS) = 19.02 TOTAL AREA(ACRES) = 4.63 PEAK FLOW RATE(CFS) = 19.02 ============================================================================ END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 4.6 TC(MIN.) = 11.18 EFFECTIVE AREA(ACRES) = 4.63 AREA-AVERAGED Fm(INCH/HR)= 0.15 AREA-AVERAGED Fp(INCH/HR) = 0.74 AREA-AVERAGED Ap = 0.200 PEAK FLOW RATE(CFS) = 19.02 ============================================================================ ============================================================================ END OF RATIONAL METHOD ANALYSIS ____________________________________________________________________________ **************************************************************************** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) (c) Copyright 1983-2016 Advanced Engineering Software (aes) Ver. 23.0 Release Date: 07/01/2016 License ID 1400 Analysis prepared by: ************************** DESCRIPTION OF STUDY ************************** * PRL-CITRUS AVE * * 100-YR STORM EVENT * * PRE-DEVELOPED CCONDITION * ************************************************************************** FILE NAME: PRL.DAT TIME/DATE OF STUDY: 16:45 11/16/2021 ============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ============================================================================ --*TIME-OF-CONCENTRATION MODEL*-- USER SPECIFIED STORM EVENT(YEAR) = 100.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *USER-DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* SLOPE OF INTENSITY DURATION CURVE(LOG(I;IN/HR) vs. LOG(Tc;MIN)) = 0.6000 USER SPECIFIED 1-HOUR INTENSITY(INCH/HOUR) = 1.7200 *ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS: 1. Relative Flow-Depth = 0.00 FEET as (Maximum Allowable Street Flow Depth) - (Top-of-Curb) 2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S) *SIZE PIPE WITH A FLOW CAPACITY GREATER THAN OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.* *USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 0.00 TO NODE 1.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< >>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 730.00 ELEVATION DATA: UPSTREAM(FEET) = 1486.00 DOWNSTREAM(FEET) = 1476.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 17.304 * 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.627 SUBAREA Tc AND LOSS RATE DATA(AMC III): DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.) NATURAL POOR COVER "OPEN BRUSH" A 4.63 0.35 1.000 81 17.30 SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.35 SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000 SUBAREA RUNOFF(CFS) = 13.64 TOTAL AREA(ACRES) = 4.63 PEAK FLOW RATE(CFS) = 13.64 ============================================================================ END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 4.6 TC(MIN.) = 17.30 EFFECTIVE AREA(ACRES) = 4.63 AREA-AVERAGED Fm(INCH/HR)= 0.35 AREA-AVERAGED Fp(INCH/HR) = 0.35 AREA-AVERAGED Ap = 1.000 PEAK FLOW RATE(CFS) = 13.64 ============================================================================ ============================================================================ END OF RATIONAL METHOD ANALYSIS ____________________________________________________________________________ **************************************************************************** HYDRAULIC ELEMENTS - I PROGRAM PACKAGE (C) Copyright 1982-2016 Advanced Engineering Software (aes) Ver. 23.0 Release Date: 07/01/2016 License ID 1400 Analysis prepared by: ---------------------------------------------------------------------------- TIME/DATE OF STUDY: 14:30 09/09/2021 ============================================================================ Problem Descriptions: 24" SD SIZING CALC 100-YR STORM **************************************************************************** >>>>PIPEFLOW HYDRAULIC INPUT INFORMATION<<<< ---------------------------------------------------------------------------- PIPE DIAMETER(FEET) = 2.000 PIPE SLOPE(FEET/FEET) = 0.0100 PIPEFLOW(CFS) = 19.00 MANNINGS FRICTION FACTOR = 0.013000 ============================================================================ CRITICAL-DEPTH FLOW INFORMATION: ---------------------------------------------------------------------------- CRITICAL DEPTH(FEET) = 1.57 CRITICAL FLOW AREA(SQUARE FEET) = 2.643 CRITICAL FLOW TOP-WIDTH(FEET) = 1.646 CRITICAL FLOW PRESSURE + MOMENTUM(POUNDS) = 381.74 CRITICAL FLOW VELOCITY(FEET/SEC.) = 7.190 CRITICAL FLOW VELOCITY HEAD(FEET) = 0.80 CRITICAL FLOW HYDRAULIC DEPTH(FEET) = 1.61 CRITICAL FLOW SPECIFIC ENERGY(FEET) = 2.37 ============================================================================ NORMAL-DEPTH FLOW INFORMATION: ---------------------------------------------------------------------------- NORMAL DEPTH(FEET) = 1.40 FLOW AREA(SQUARE FEET) = 2.36 FLOW TOP-WIDTH(FEET) = 1.830 FLOW PRESSURE + MOMENTUM(POUNDS) = 388.12 FLOW VELOCITY(FEET/SEC.) = 8.068 FLOW VELOCITY HEAD(FEET) = 1.011 HYDRAULIC DEPTH(FEET) = 1.29 FROUDE NUMBER = 1.253 SPECIFIC ENERGY(FEET) = 2.41 ============================================================================ 1 ____________________________________________________________________________ **************************************************************************** HYDRAULIC ELEMENTS - I PROGRAM PACKAGE (C) Copyright 1982-2016 Advanced Engineering Software (aes) Ver. 23.0 Release Date: 07/01/2016 License ID 1400 Analysis prepared by: ---------------------------------------------------------------------------- TIME/DATE OF STUDY: 14:52 11/17/2021 ============================================================================ Problem Descriptions: 48" RCP CAPACITY CALC CITRUS AVE **************************************************************************** >>>>PIPEFLOW HYDRAULIC INPUT INFORMATION<<<< ---------------------------------------------------------------------------- PIPE DIAMETER(FEET) = 4.000 FLOWDEPTH(FEET) = 3.600 PIPE SLOPE(FEET/FEET) = 0.0100 MANNINGS FRICTION FACTOR = 0.013000 >>>>> NORMAL DEPTH FLOW(CFS) = 153.09 ============================================================================ NORMAL-DEPTH FLOW INFORMATION: ---------------------------------------------------------------------------- NORMAL DEPTH(FEET) = 3.60 FLOW AREA(SQUARE FEET) = 11.91 FLOW TOP-WIDTH(FEET) = 2.400 FLOW PRESSURE + MOMENTUM(POUNDS) = 5076.32 FLOW VELOCITY(FEET/SEC.) = 12.852 FLOW VELOCITY HEAD(FEET) = 2.565 HYDRAULIC DEPTH(FEET) = 4.96 FROUDE NUMBER = 1.017 SPECIFIC ENERGY(FEET) = 6.16 ============================================================================ 1 CITRUS AVENUECITY IMPROVEMENT PLANS1 6 1 5 6 10 11 15 18 22 27 23 28 32 3839 43 48 44 49 53 58 54 59 63 68 64 10 22 3023 45 34 57 9 46 5 8 17 16 33 31 33 A B B B A A B B B A A B B B A A B B B A A B B B A A B B B A A A A B B B A A B B B A A B B B A A B B B A A B B B A A B B B A A B B B A B OPEN AREA CONTECH CHAMBER SYSTEM #2 INF/RET CAPACITY: 13,884 CF FOOTPRINT: 98'x37' DMA-1 (4.63 AC) IN WALNUT AVE (LINE D2) TO 60" RCP MASTER STORM DRAIN 5'Ø EACH 12 BARRELSCONTECH CHAMBER SYSTEM #1 INF/RET CAPACITY: 9,012 CF FOOTPRINT: 568'x5' 4'Ø SINGLE BARREL DMA-1 (4.63 AC) 100 FS 1479.0 Q = 19.0 CFS 1 FG 1487.0 (HP) Q = 0.0 CFS100 0 EMMERGENCY OVERFLOW: DRAINS ON SURFACE, DISCARGE TO STREET VIA PROP. PARKWAY DRAIN48" RCP SD24" PROP RCP LATERALCivil Engineering - Land Surveying - Land Planning 16866 Seville Avenue Fontana, California 92335 ALLARD ENGINEERING Prepared By: (909) 356-1815 Fax (909) 356-1795 Prepared For:ea CITY OF FONTANA PRELIMINARY DRAINAGE EXHIBIT CALIFORNIA APN 0240-011-17 PRL, LLC FG 1038.5 (HP) Q = 0.0 CFS100 0 HP: 1486 EG LP: 1476 EG SITE: 4.63 AC L=730'