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Home My WebLink AboutDrainage Study Tract 7408 S. Allen Rd24-20000055 07/02/24 REV March 2024 24-20000055 07/02/24 2 Table of Contents 1.0 PURPOSE ............................................................................................................... 3 2.0 GUIDELINES .......................................................................................................... 3 3.0 DESIGN APPROACH ............................................................................................. 3 4.0 CONCLUSION AND RECOMMENDATIONS .......................................................... 4 Hydrology Calculations ........................................................................... back of report Inlet Sizing Calculations .......................................................................... back of report Basin Exhibit ............................................................................ sleeve in back of report Drainage Exhibit ...................................................................... sleeve in back of report Reference ............................................................................................... back of report 24-20000055 07/02/24 3 1.0 PURPOSE The purpose for this drainage study is as follows: 1. To size sump in accordance with the City of Bakersfield requirements and guidelines. 2. To check curb capacities. 2.0 GUIDELINES The following design standards were used in the development of this study: 1. Initial times to concentration (roof to gutter) are 15 minutes for R-1 Development. 2. Approximately 100% of the site is Soil Group A – Kimberlina fine sandy loam, 0-2 percent slopes. The soil group was obtained from the US Department of Agriculture Soils Survey. A Soil Map is enclosed with this report. 3. The runoff coefficients used are: · 0.15 - Park · 0.69 - R-1, 3600-4000 SF (COMPOSITE) · 0.85 - Pavement w/ Landscaping 3. Rainfall intensity curves used are those shown on Plate D-1 of the City of Bakersfield, Subdivision & Engineering Manual. 4. Sub-areas using multiple run-off coefficients are given a weighted average based on the area relative to each coefficient. 3.0 DESIGN APPROACH The contributing areas to the proposed retention basin are zoned residential with collector & arterial streets therefore were modeled as such so that the improvements were accurate. The project area for the site improvements are dictated by the terrain that is present. More specifically the watershed are designed to benefit all areas bounded by the undeveloped land to the east, South Allen Road to the west, Pensinger Road to the south, and to the north by existing railroad tracks that takes area runoff into the Basin Drainage Area. The watershed includes portions of future Tract 7415 into the proposed sump. Catch Basin #1 will collect runoff from Drainage Area 1 located at the T-intersection of Roble Drive and Alisa Lane. Drainage Area 2 has a flow path is greater than one thousand feet thus will have analysis which will flowby into CB #2 and broken up accordingly. Drainage Area 3 will consists of a portion of Allen Road & Alisa Lane. These areas will discharge into two catch basins (CB #2 & #3) located on Alisa Lane. A portion of the park site will consist of Drainage Area 4 which is on the northerly side of Calle Cayente. Drainage Area 5 will comprise of a small part of Calle Cayente. Catch Basins #4 & #5 will collect discharge on Calle Cayente between Camino Dichosa & Calle Corona. Drainage Areas 6 & 7 consists of the residential lots along Calle Sastre which will discharge into two catch basins (CB #6 & #7) adjacent to the Calle Fruteria knuckle. Two catch basins (CB #8 & CB #9) will be located on Calle Presada between Camino Fruteria & Calle Cayente that will collect runoff from Drainage Areas 8 & 9. Catch Basin #10 will collect from Drainage Area 10 located at the T-intersection of Calle Presada and Calle Fruteria. Drainage Area 11 will discharge into a catch basin (CB #11) along Calle Fruteria is which at the T- inersection with Calle Corona. Two catch basins (CB #12 & CB #13) will be located on Camino Dichosa, between Camino Fruteria & Calle Cayente, which will handle the runoff from Drainage Areas 12 & 13. Catch Basin #14 will collect runoff from Drainage Area 14 (residential lots along Camino Fruteria) located at the T-intersection of with Camino Dichosa. Drainage Areas 15 and 16 will discharge into two catch basins (CB #15 & CB #16) located along Camino Dichosa, between Camino Fruteria & Calle Cayente. Catch Basin #17 will collect from Drainage Area 17 (residential lots along Camino Carreta knuckle) which located adjacent to the sump. Catch Basin #18 will collect the discharge from Drainage Area 18 located at the intersection of Giocondo Avenue and Pensinger Road. Off-site Drainage Areas 19 will discharge into a catch basin (CB #19) located 24-20000055 07/02/24 4 along South Allen Road. These two areas will discharge as part of a separate drainage system from the on-site storm drain. The flows discharging into the catch basins were estimated utilizing the City of Bakersfield Rational Method in accordance with the Subdivision Standards. Flows were computed for the 10- year event using the formula Q = CIA, where Q is the flow in cubic feet per second, C is the runoff coefficient, I is the intensity in inches per hour, and A is the catchment’s area in acres. Since the main purpose of this report is the storm drain system leading to the basin and the curb capacities were determined based the 5-year storm event. 4.0 CONCLUSION AND RECOMMENDATIONS The main objectives of this study were to provide proper storm water runoff conveyance within the street R/W and an economical and reasonable design sizes for catch basins and other disposal inlets that meet the design standards set by the City of Bakersfield. The basin will be to accommodate the runoff from Tract 7408 & future Tract 7415. The required basin volume was calculated using the City of Bakersfield sump volume equation (V=0.15 x Ʃ (CxA)). The required volume for was calculated to be is 7.83 AF based on-site residential and portions of South Allen Road & Pensinger Road. The basin was designed to provide a volume of 7.88 AF with a 10.0-ft high design water surface thus having an excess volume of 0.05 AF. Future Tract 7415 will be analyzed in detail at a later date with the development of the grading plans. The hydraulics routing and pipe sizing calculations for Tract 7408 will be submitted as part of a separate report with the submittal of the sewer & storm drain improvement plans. 24-20000055 07/02/24 SOIL MAP 24-20000055 07/02/24 Hydrologic Soil Group—Kern County, California, Northwestern PartNatural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/5/2024Page 1 of 43908840 3908920 3909000 3909080 3909160 39092403908760 3908840 3908920 3909000 3909080 3909160 3909240304750 304830 304910 304990 305070 305150 305230 305310 305390 305470304750 304830 304910 304990 305070 305150 305230 305310 305390 30547035 ° 18' 26'' N 119° 8' 51'' W35 ° 18' 26'' N119° 8' 22'' W35 ° 18' 11'' N 119° 8' 51'' W 35 ° 18' 11'' N119° 8' 22'' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS840 150 300 600 900Feet0 50 100 200 300MetersMap Scale: 1:3,430 if printed on A landscape (11" x 8.5") sheet.Soil Map may not be valid at this scale.24-20000055 07/02/24 MAP LEGEND MAP INFORMATIONArea of Interest (AOI) Area of Interest (AOI) SoilsSoil Rating PolygonsAA/D B B/DCC/DDNot rated or not availableSoil Rating Lines A A/D B B/DCC/DD Not rated or not available Soil Rating PointsA A/D B B/DC C/DD Not rated or not available Water Features Streams and Canals TransportationRails Interstate Highways US Routes Major Roads Local Roads BackgroundAerial PhotographyThe soil surveys that comprise your AOI were mapped at1:24,000.Warning: Soil Map may not be valid at this scale.Enlargement of maps beyond the scale of mapping can causemisunderstanding of the detail of mapping and accuracy of soilline placement. The maps do not show the small areas ofcontrasting soils that could have been shown at a more detailedscale.Please rely on the bar scale on each map sheet for mapmeasurements.Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL:Coordinate System: Web Mercator (EPSG:3857)Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but distortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if moreaccurate calculations of distance or area are required.This product is generated from the USDA-NRCS certified data asof the version date(s) listed below.Soil Survey Area: Kern County, California, Northwestern PartSurvey Area Data: Version 16, Aug 31, 2023Soil map units are labeled (as space allows) for map scales1:50,000 or larger.Date(s) aerial images were photographed: Mar 12, 2022—Mar22, 2022The orthophoto or other base map on which the soil lines werecompiled and digitized probably differs from the backgroundimagery displayed on these maps. As a result, some minorshifting of map unit boundaries may be evident.Hydrologic Soil Group—Kern County, California, Northwestern PartNatural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/5/2024Page 2 of 424-20000055 07/02/24 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 174 Kimberlina fine sandy loam, 0 to 2 percent slopes MLRA 17 A 41.2 100.0% Totals for Area of Interest 41.2 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Hydrologic Soil Group—Kern County, California, Northwestern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/5/2024 Page 3 of 4 24-20000055 07/02/24 Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Kern County, California, Northwestern Part Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 1/5/2024 Page 4 of 4 24-20000055 07/02/24 HYDROLOGY CALCULATIONS 24-20000055 07/02/24 CITY OF BAKERSFIELD RATIONAL METHOD (In accordance with City of Bakersfield Standards) TABLE OF RUNOFF COEFFICIENTS R-1, 6000 SF 0.42 JOB TITLE:TRACT 7408 R-1, 6750 SF 0.4 DATE:Mar-24 R-1, 7500 SF 0.38 R-1, 10000 SF 0.34 Rational Values:R-1, 15000 SF 0.27 Event:10 YEAR Values: 5, 10, 50 COMPOSITE R-1, 3600-4000 SF 0.69 M.A.P.6 in./yr. Values: 6, 10, 15, 20, 25, 30 R-3, R-4, M-H 0.8 Commercial 0.9 Curve Values Parks 0.15 a: 2.38 I=a+bTc (Tc<20min.)Grasslands, Type A Soil 0.15 b: -0.058 Grasslands, Type B Soil 0.25 P60: 0.550 I=K1*(6.02*Tc)^(0.17*LN(p60/K1)Grasslands, Type C Soil 0.35 K1: 40.00 (Tc>=20min.)Grasslands, Type D Soil 0.45 Pavement with Landscaping 0.85 Backyards 0.05 Lawn-landscape 2% slope 0.10 0.17 Lawn-landscape 2-7% slope 0.15 0.22 Lawn-landscape 7% slope 0.20 0.35 SUBAREA C I A rslt Tc L dH Sg Q Street V Trial Tc Roof to Tm D Curb NAME Runoff Intensity Total Time Length Elev. Gutter Flow Type Vel. MIN. Gutter Travel Pipe Cap Coef. IN/HR Area Conc. Feet Diff. Slope CFS FPS Time Time Dia. In AC. MIN. Feet Ft/Ft MIN. MIN. In. FUTURE AREA 0.64 1.11 36.75 22.82 929 3.10 0.33% 26.03 60 1.98 22.82 15 7.82 AREA 1 0.15 1.80 0.62 10.00 97 1.26 1.30% 0.17 60 1.97 10.00 0 0.82 1.07 AREA 2A 0.85 1.80 1.52 10.00 1000 3.04 0.30% 2.33 60 1.92 10.00 0 8.67 4.14 AREA 2A (Routed) 0.85 1.80 1.52 10.00 2.33 10.00 4.14 AREA 2B 0.85 1.80 0.66 10.00 522 1.56 0.30% 1.01 60 1.66 10.00 0 5.25 3.19 AREA 2 (Total)0.85 1.80 2.18 10.00 0.30% 3.34 60 1.98 10.00 4.52 AREA 3 0.81 1.46 1.45 15.85 134 1.98 1.47% 1.71 60 2.65 15.85 15 0.85 3.04 AREA 4 0.15 1.80 2.15 10.00 440 0.94 0.21% 0.58 60 1.37 10.00 0 5.37 2.83 AREA 5 0.69 1.80 0.21 10.00 133 0.94 0.71% 0.26 60 1.45 10.00 0 1.53 1.78 AREA 6 0.69 1.33 2.95 18.06 410 1.77 0.43% 2.71 60 2.23 18.06 15 3.06 4.15 AREA 7 0.69 1.33 3.04 18.16 389 1.39 0.36% 2.78 60 2.05 18.16 15 3.16 4.21 AREA 8 0.69 1.20 6.57 20.51 762 2.80 0.37% 5.42 60 2.31 20.51 15 5.51 5.14 AREA 9 0.69 1.30 2.25 18.54 404 1.19 0.29% 2.02 60 1.90 18.54 15 3.54 4.03 AREA 10 0.69 1.45 0.75 16.08 97 0.24 0.25% 0.75 60 1.51 16.08 15 1.08 3.03 AREA 11 0.69 1.43 1.07 16.32 124 0.31 0.25% 1.06 60 1.56 16.32 15 1.32 3.31 AREA 12 0.69 1.31 2.25 18.42 404 1.49 0.37% 2.03 60 1.97 18.42 15 3.42 3.88 AREA 13 0.69 1.32 2.90 18.30 404 1.49 0.37% 2.64 60 2.04 18.30 15 3.30 4.16 AREA 14 0.69 1.46 1.96 15.87 119 0.65 0.55% 1.97 60 2.28 15.87 15 0.87 3.65 AREA 15 0.69 1.31 2.97 18.47 404 1.19 0.29% 2.68 60 1.94 18.47 15 3.47 4.27 AREA 16 0.69 1.32 3.00 18.29 404 1.32 0.33% 2.73 60 2.05 18.29 15 3.29 4.19 AREA 17 0.69 1.34 2.14 17.94 377 1.45 0.38% 1.98 60 2.14 17.94 15 2.94 3.80 AREA 18 0.77 1.43 1.44 16.44 223 1.72 0.77% 1.57 60 2.58 16.44 15 1.44 2.94 AREA 19 0.85 1.80 2.05 10.00 777 3.10 0.40% 3.14 60 2.26 10.00 0 5.73 4.29 AREA 20 0.85 1.80 0.31 10.00 157 0.70 0.45% 0.47 60 1.51 10.00 0 1.74 2.43 Tc CALCULATIONS TRACT 7408 Hydrology_10_yr - Copy.xls McIntosh Associates 10800 Stockdale Hwy., Suite 103 Bakersfield, CA 93311 10 yr Calc 24-20000055 07/02/24 INLET & PIPE SIZING CALCULATIONS INLET PE SIZING CALCULATIONS INLET 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 1: CB-1> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 0.17 Highlighted Q Total (cfs) = 0.17 Q Capt (cfs) = 0.17 Q Bypass (cfs) = -0- Depth at Inlet (in) = 4.08 Efficiency (%) = 100 Gutter Spread (ft) = 2.38 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 2: CB-2> Curb Inlet Location = Sag Curb Length (ft) = 5.00 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.031 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 3.34 Highlighted Q Total (cfs) = 3.34 Q Capt (cfs) = 3.34 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.91 Efficiency (%) = 100 Gutter Spread (ft) = 9.85 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 3: CB-3> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.022 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 1.71 Highlighted Q Total (cfs) = 1.71 Q Capt (cfs) = 1.71 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.13 Efficiency (%) = 100 Gutter Spread (ft) = 10.00 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 4: CB-4> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 0.58 Highlighted Q Total (cfs) = 0.58 Q Capt (cfs) = 0.58 Q Bypass (cfs) = -0- Depth at Inlet (in) = 4.81 Efficiency (%) = 100 Gutter Spread (ft) = 5.40 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 5: CB-5> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 0.26 Highlighted Q Total (cfs) = 0.26 Q Capt (cfs) = 0.26 Q Bypass (cfs) = -0- Depth at Inlet (in) = 4.27 Efficiency (%) = 100 Gutter Spread (ft) = 3.16 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 6: CB-6> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.030 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.71 Highlighted Q Total (cfs) = 2.71 Q Capt (cfs) = 2.71 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.89 Efficiency (%) = 100 Gutter Spread (ft) = 10.00 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 7: CB-7> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.031 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.78 Highlighted Q Total (cfs) = 2.78 Q Capt (cfs) = 2.78 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.93 Efficiency (%) = 100 Gutter Spread (ft) = 9.90 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 8: CB-8> Curb Inlet Location = Sag Curb Length (ft) = 10.00 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.031 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 5.42 Highlighted Q Total (cfs) = 5.42 Q Capt (cfs) = 5.42 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.98 Efficiency (%) = 100 Gutter Spread (ft) = 10.00 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.Friday, Jan 5 2024 Drainage Area 9: CB-9> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.025 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.02 Highlighted Q Total (cfs) = 2.02 Q Capt (cfs) = 2.02 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.37 Efficiency (%) = 100 Gutter Spread (ft) = 9.92 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 10: CB-10> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 0.75 Highlighted Q Total (cfs) = 0.75 Q Capt (cfs) = 0.75 Q Bypass (cfs) = -0- Depth at Inlet (in) = 5.05 Efficiency (%) = 100 Gutter Spread (ft) = 6.41 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 11: CB-11> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 1.06 Highlighted Q Total (cfs) = 1.06 Q Capt (cfs) = 1.06 Q Bypass (cfs) = -0- Depth at Inlet (in) = 5.45 Efficiency (%) = 100 Gutter Spread (ft) = 8.07 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 12: CB-12> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.025 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.03 Highlighted Q Total (cfs) = 2.03 Q Capt (cfs) = 2.03 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.38 Efficiency (%) = 100 Gutter Spread (ft) = 9.96 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 13: CB-13> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.030 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.64 Highlighted Q Total (cfs) = 2.64 Q Capt (cfs) = 2.64 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.83 Efficiency (%) = 100 Gutter Spread (ft) = 9.89 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 14: CB-14> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.025 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 1.97 Highlighted Q Total (cfs) = 1.97 Q Capt (cfs) = 1.97 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.32 Efficiency (%) = 100 Gutter Spread (ft) = 9.76 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 15: CB-15> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.030 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.68 Highlighted Q Total (cfs) = 2.68 Q Capt (cfs) = 2.68 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.87 Efficiency (%) = 100 Gutter Spread (ft) = 9.99 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 16: CB-16> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.031 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 2.73 Highlighted Q Total (cfs) = 2.73 Q Capt (cfs) = 2.73 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.89 Efficiency (%) = 100 Gutter Spread (ft) = 9.78 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 17: CB-17> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.025 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 1.98 Highlighted Q Total (cfs) = 1.98 Q Capt (cfs) = 1.98 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.33 Efficiency (%) = 100 Gutter Spread (ft) = 9.79 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Mar 8 2024 Drainage Area 18: CB-18> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.021 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 1.57 Highlighted Q Total (cfs) = 1.57 Q Capt (cfs) = 1.57 Q Bypass (cfs) = -0- Depth at Inlet (in) = 6.00 Efficiency (%) = 100 Gutter Spread (ft) = 9.99 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 Inlet Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jan 5 2024 Drainage Area 19: CB-19> Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.034 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs)= 3.14 Highlighted Q Total (cfs) = 3.14 Q Capt (cfs) = 3.14 Q Bypass (cfs) = -0- Depth at Inlet (in) = 7.17 Efficiency (%) = 100 Gutter Spread (ft) = 9.79 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- 24-20000055 07/02/24 ˘ˇˆ˙˝˛˚˜ ˝!"#$#% Drainage Area 20: CB-20 &˚'() ˙&)*+,'ˇ˜-$ .*)*+,'%˜$$ /+0,'1$1 /2*+,'1$1 /&)*+,'1$1 (˝(+3,'$˜$"ˇ (˝(+3,'$˜$#$ &˚ˆ+,'#˜$$ /2*+,'#˜$$ /(+4,'1$1 /1˘'1$1 5˙6 78 8+˚,' $˜%9 ˘ˇ˘ˇˆ 8.+˚,'$˜%9 8+˚,'$˜%9 8:+˚,'1$1 ˆ*˛+,'%˜;% ˚˚+4,'<$$ /(+,'%˜;= />+3,'1$1 :(+,'1$1 :ˆ*+,'1$1 Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.00 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.083 Slope, Sx (ft/ft) = 0.020 Local Depr (in)= 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by:Known Q Q (cfs) = 0.47 Highlighted Q Total (cfs) = 0.47 Q Capt (cfs) = 0.47 Q Bypass (cfs)= -0- Depth at Inlet (in) = 4.64 Efficiency (%) = 100 Gutter Spread (ft) = 4.69 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Mar 8 2024 Inlet Report 24-20000055 07/02/24 DBASIN EXHIBIT 24-20000055 07/02/24 TRACT 7408 and FUTURE TRACT 7415 BASIN SIZING CALCULATIONS 1 341.5 340.5 330.5 10 feet Abtm =26,566 sq ft =0.61 acres Amid =34,266 sq ft =0.79acres Atop =42,636 sq ft =0.98 acres Provided Sump Capacity =343,778 Cu. FT 7.89 AC-FT TABLE OF RUNOFF COEFFICIENTS C x A = FUTURE TR 7408 TR 7415 R-1, 6000 SF 0.42 R-1, 6750 SF 0.4 R-1, 7500 SF 0.38 R-1, 10000 SF 0.34 R-1, 15000 SF 0.27 R-2 0.55 COMPOSITE R-1, 3600-4000 SF 0.69 33.35 33.21 45.93 R-3, R-4, M-H 0.8 Commercial 0.9 Industrial 0.8 Parks 0.15 3.40 2.77 0.93 Grasslands, Type A Soil 0.15 Grasslands, Type B Soil 0.25 Grasslands, Type C Soil 0.35 Grasslands, Type D Soil 0.45 Pavement with Landscaping 0.85 6.28 5.34 Backyards 0.05 Lawn-landscape 2% slope 0.17 Lawn-landscape 2-7% slope 0.22 Lawn-landscape 7% slope 0.35 n C x A = 52.19 TR 7415 TR 7408 Total 36.75 42.26 = Acres 79.01 Required Sump Capacity = 0.15 x C x A = 0.15 X n C x A = 7.83 AC-FT 0.06 AC-FT FUTURE Total Difference of Bottom Area of Sump Half Depth Area of Sump Area of Design Water Level Prismoidal Formula: Volume = 1/6 x(Abtm+4Amid+Atop) x D Required Sump Capacity Depth from Design Water Surface = Provided Sump Capacity Freeboard (ft)=Lowest Inlet Elev = Water Surface Elev =Bottom Basin Elev = 8 24-20000055 07/02/24 Know what'sbelow. before you dig.Call R NEW GEN ENGINEERING GROUPREFERENCE ONLY24-20000055 07/02/24 DRAINAGE EXHIBIT 24-20000055 07/02/24 NEW GEN ENGINEERING GROUP24-20000055 07/02/24 NEW GEN ENGINEERING GROUP24-20000055 07/02/24