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Home My WebLink AboutDrainage ReportCERTIFICATION I, Joseph P. Schultz, Licensed Professional Engineer No. 65889, State of Tex·as, certify that this report for the drainage design for the Fox Run Condominiums, was prepared by me in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners hereof. __ ,,,,,,, --"\'E. OF r ' _,, ~ ••••••• ~J.., '"' ,,,. ., ..•.. ..,...,, ·~ , 0 •• •• •• •• 'oJ> '• "* .. .. * ,,. ~*: ·.*11 ~···················~···············';! , .. AP.~.;r.~ .. ~; .. ~~~.Y.~g···l ~?~··.~~ 65889 9./&~ ·11~ ··.~/STE'?-.~·· ~; '\ Ss ·····••' ~0., \\"10NAL <(;;.-,,,;" .... ,,~- 2 .--]._\ -0~ L. Urso, P.E. REVIEWED FOR CQ lAD' I A U~E MAR !t 1 2003 ~ COLLt:uc. "."" rlON ENGINEERING -'o~ -v\! 7~~~~ TABLE OF CONTENTS FOX RUN CONDOMINIUMS CERTIFICATION ......................................................................................................................................................... 1 TABLE OF CONTENTS ............................................................................................................................................... 2 LIST OFT ABLES .......................................................................................................................................................... 2 INTRODUCTION .......................................................................................................................................................... 3 GENERAL LOCATION AND DESCRIPTION ......................................................................................................... 3 FLOOD HAZARD INFORMATION ........................................................................................................................... 3 DEVELOPMENT DRAINAGE PATTERNS .............................................................................................................. 3 DRAINAGE DESIGN CRITERIA ............................................................................................................................... 4 STORM WATER RUNOFF DETERMINATION ..................................................................................................... .4 DETENTION FACILITY DESIGN ............................................................................................................................. 7 CONCLUSIONS ............................................................................................................................................................. 8 APPENDIX A ................................................................................................................................................................. 9 Storm Sewer Inlet Design Calculations APPENDIX B ................................................................................................................................................................ 11 Storm Sewer Pipe Design Calculations APPENDIX C ............................................................................................................................................................... 46 Detention Pond Data APPENDIX D ............................................................................................................................................................... 50 Time of Concentration Calculations EXHIBIT A ................................................................................................................................................................... 53 Pre-Development Drainage Area Map EXHIBIT B ................................................................................................................................................................... 55 Post-Development Drainage Area Map LIST OFT ABLES TABLE 1 -Post-Development Runoff Infon11ation -Rational Equation -Private Ston11 Sewer ... 6 TABLE 2 -Pre-Development Runoff Infon11ation -HEC-1 ........................................................... 7 TABLE 3 -Post-Development Runoff Information -HEC-1 .......................................................... 7 TABLE.4-Pre & Post-Development Runoff Comparison-HEC-1 ............................................... 8 TABLE 5 -Summary of Maximum Pond Water Levels .................................................................. 8 2 DRAINAGE REPORT FOX RUN CONDOMINIUMS INTRODUCTION The purpose of this report is to provide the hydrological effects of the construction of the Fox Run Condominiums, and to show that the storm water drainage structures and the existing and proposed detention facilities for this site will control the stom1 water runoff in such a manner so as to have no offsite or downstream imp act. GENERAL LOCATION AND DESCRIPTION The project is located on a 9.18 acre tract located on Luther Street adjacent to the Melrose Apartments in College Station, Texas. This property was previously proposed to be Phase 2 of the Melrose Apartments proj ect. The site is mostly open, as it was previously disturbed by the construction of Phase 1 of the Melrose Apartments. The existing ground elevations range from elevation 316 to elevation 334. The general location of the project site is shown on the vicinity map in Exhibit A. FLOOD HAZARD INFORMATION The project site is located in the White Creek Drainage Basin. This development is located in a Zone X Area according to the Flood Insurance Rate Map prepared by the Federal Emergency Management Agency for Brazos County, Texas and incorporated areas dated July 2, 1992, panel number 48041C0182-C. Zone X Areas are determined to be outside of the 500-yr floodplain. DEVELOPMENT DRAINAGE PATTERNS The storm water runoff from the site prior to this development flowed to the west into Luther Street or the adjacent property. The runoff enters the stonn sewer system on Luther Street or the apartment complex do wnstream of this project and ultimately flows into White Creek. The pre-development area is shown in Exhibit A. The topography shown on this exhibit is prior to the grading work done during the construction of Phase 1 of the Melrose Apartments. The pre-development area shown is the portion of the tract which flows to the existing storm sewer system on Luther Street, which is the discharge point for the proposed detention facility. After the proposed development, a majority of the storm water runoff will be captured by the proposed storm sewer systems and travel to th_e existing and proposed detenho ponds. The proposed detention pond will be located at the western comer of the project. A small portion of the site will continue to flow offsite to the northwest and southwest. The amount of runoff flowing offsite will be addressed in subsequent sections of this report. A review of the Drainage Report prepared in 1998 for the Melrose Apartments project indicates that 4.39 acres of this 9.18 acre tract would flow to a proposed detention pond in the same location as the detention fac ility proposed for this project. The remaining 4.79 acres of the tract was di verted to the ex ist in g detention pond built with Phase l of the , -' Melrose Apartments, which is located south of this project. The proposed grading plan for the Fox Run Condominiums project has 4.51 acres flowing to the existing detention pond, as shown on Exhibit B. The remaining 4.68 acres will flow into the proposed detention pond or directly offsite. The post development drainage area boundaries are shown in Exhibit B. The post- development runoff will be controlled and released at or below the pre-development peak runoff rates for the design stonn event by detai ning the runoff in the detention ponds. The design criteria and results of the proposed detention pond design are included in subsequent sections of this repo1i. DRAINAGE DESIGN CRITERIA The design parameters for the private and public storm sewer and detention pond are as follows: • The Rational Method is utilized to determine peak storm water runoff rates for the storm sewer design, and the HEC-1 computer program is utilized to determine peak storm water runoff rates for the detention facility design. • Design Storm Frequency Private & Public Stonn Sewer 10 and 100-year storm events Detention Pond 5, 10, 25, 50 and 100-year storm events • Runoff Coefficients -Storm Sewer Pre-development (undeveloped land) Post-development • Runoff Curve Number (CN) -Detention Pond c = 0.30 c = 0.78 The Brazos County Soil Survey shows the soils in the area to be classified as hydrologic group D soils. The pre-development CN is based on no development on the site. The post-development CN is based on development of the site. The CN calculations are found in Appendix C. • Time of Concentration, tc -Calculations for pre-development conditions are based on the method found in the TR-55 publication. Refer to Appendix D for the equations and calculations. Due to the small sizes of the drainage areas for the post-development conditions, the calculated times of concentration, tc, are less than 10 minutes. Therefore, a minimum tc of 10 minutes is used in these cases to determine the rainfall intensity. Where a longer time of concentration was necessary, it is noted and used accordingly. The drainage runoff flow path used for calculation of the pre- development time of concentration is shown in Exhibit A. STORM WATER RUNOFF DETERMINATION The peak runoff values for the stom1 sewer system were detem1ined in accordance with the criteria presented in the previous section for the 10 and 100-year stonn events. The runoff coefficients are based on the development of this tract. The post-development flows for 4 Pipe No. 1 are the peak discharge values out of the proposed detention pond as computed by the HEC-1 program. Post-development runoff conditions are summarized in Table 1. Post-development areas flowing into the detention pond and other detention pond data are addressed in a subsequent section of this report. The proposed storm sewer grate inlets were sized using the orifice equation, solving for the clear opening area: Q = 4.82 *Ag * y 112 ¢ Ag= QI (4.82 * y112) where Q = capacity, cfs Ag = clear opening area, sq. ft. y = total depth of water on the inlet, ft. The capacity of inlets was reduced for clogging. Capacities of inlets in pavement areas were reduced by 25%, and capacities of inlets in grass areas were reduced by 50%. The summary of inlet sizes and design calculations are summarized in Appendix A. The inlets in the pavement areas were designed for a maximum depth of 6" for the 10-year stonn event. Pipe No. 1 is proposed as part of the public storm sewer system. The public stom1 sewer piping for this project has been selected to be Reinforced Concrete Pipe (RCP) meeting the requirements of ASTM C-76, Class III pipe for the 27" diameter pipe. The private storm sewer system pipe material will be A-2000 com1gated PVC pipe provided by Contech Construction Products. The grate inlets in pavement areas and the junction box will be cast-in-place concrete. In grass areas, PVC drain inlets and catch basins will be used to collect the runoff. Appendix B presents a summary of the storm sewer pipe design parameters and design calculations. As the data shows, even during low flow conditions, the velocity in the pipes will exceed 2 feet per second and prevent sediment build-up in the pipes. The maximum flow in the storm sewer pipe system will occur in Pipe No. 2. The maximum velocity for the pipe system will be 9.0 feet per second and will occur in Pipe No. 25. A majority of the pipes for this storm sewer system will pass the 10-and 100-year storm events. The 100-year event for Pipes 1, 2, 4, 21, 26 & 27 does not pass using the Rational Method, but these pipes were checked with the culvert calculator, and the headwater for each is less than the top of the pavement. 5 TABLE 1 -Post-Development Runoff I nfor mation -Rational Equatio n -Private Storm Sewer A c le 0 10 Area # (acres) (min) (cfs) 1 0.28 0.78 10 1.89 2 0.04 0.78 10 0.27 3 0.82 0.78 10 5.52 4 0.69 0.78 10 4.65 5 0.25 0.78 10 1.68 6 0.70 0.78 10 4.71 7 0.50 0.78 10 3.37 8 0.14 0.78 10 0.94 9 0.74 0.78 10 4.98 10 0.16 0.78 10 1.08 11 0.18 0.78 10 1.21 12 0.49 0.78 10 3.30 13 0.27 0.78 10 1.82 14 0.85 0.78 10 5.73 ------------. -15 0.36 0.78 10 2.42 16 0.08 0.78 10 0.54 17 0.07 0.78 10 0.47 ---------------·-18 0.17 0.78 10 1.15 19 0.13 0.78 10 0.88 20 0.07 0.78 10 0.47 21 0.54 0.78 10 3.64 22 0.27 0.78 10 1.82 23 0.07 0.78 10 0.47 24 0.23 0.78 10 1.55 ------------25 0.02 0.78 10 0.13 ------------26 0.07 0.78 10 27 0.05 0.78 10 29 0.15 0.78 10 30 0.26 0.78 10 31 O.D7 0.78 10 32 0.09 0.78 10 33 0.09 0.78 10 ------------34 0.09 0.78 10 ------------35 0.08 0.78 10 36 0.12 0.78 10 Note: Area 28 has been omitted. The Rational Method: Q=CIA Q =Flow (cfs) A= Area (acres) C = Runoff Coeff. I = Rainfall Intensity (in/hr) Rainfall Intensity Values (in/hr) Storm Event 110 1100 Brazos County: 10 year storm b = 80 d = 8.5 e = 0.763 I = c 10 min 8.635 11.639 100 year storm b = 96 d = 8.0 e = 0.730 0.47 0.34 1.01 1.75 0.47 0.61 0.61 -- 0.61 --- 0.54 0.81 0 100 (cfs) 2.54 0.36 7.44 6.26 2.27 6.35 4.54 1.27 6.72 1.45 1.63 4.45 2.45 7.72 -- 3.27 0.73 0.64 1.54 1.18 0.64 4.90 2.45 0.64 2.09 --0.18 ---- 0.64 0.45 1.36 2.36 0.64 0.82 0.82 --- 0.82 0.73 1.09 I = b I (tc+d)0 I = Rainfall Intensity (in/hr) tc = L/(V*60) le = Time of concentration (min) L = Length (ft) V = Velocity (ft/sec) (Data taken from State Department of Highways and Public Transportation Hydraulic Manual , page 2-16) 6 DETENTION FACILITY DESIGN The design stom1 for the detention pond is the 100-year storm event. The peak runoff values were determined in accordance with the criteria presented in previous sections for the 5, 10, 25 , 50 & 100-year stom1 events for pre-development conditions. Table 2 shows a summary of these results. The dev elopment of this project is simi lar to the Melrose Apartments Phase 2 development so it has been assumed that the existing storm sewer system and detention pond in the Melrose Apartments project will adequately control the post-development runoff as long as the area draining to the pond has not increased. As previously noted, the area fro m the Fox Run development draining to the existing detention pond is 4.51 acres, which is less than the 4. 79 acres the pond was designed to control. TABLE 2 -Pre-Development Runoff Information -HEC-1 Drainage Area #101 Area = 7 .18 acres CN = 80 tc = 29.3 minutes (see Appendix D for calculations) L 0 293 h ag = ours Storm Flow from Area #101 (cfs) Os 17 0 10 21 0 2s 27 Oso 31 0 100 35 Runoff from 3.86 acres of the site flows into the proposed detention pond. There is 0.82 acres (D.A. #3 on Exhibit B) which flows offsite into Luther Street or onto the adjacent property to the west. Post-development peak runoff values as computed by the HEC-1 program are shown in Table 3. The combined total is less than the sum of the offsite peak flow from Drainage Area #3 and the peak discharge from the detention pond because they occur at different times. The peak runoff rates from the site for the post-development conditions will be reduced to less than or equal the peak rates for the pre-development conditions by temporarily impounding the runoff in the proposed detention pond. TABLE 3-Post-Development Runoff Information -HEC-1 Storm Into Pond Offsite Pond Peak Discharge Combined Total (cfs) (cfs) (cfs) (cfs) Os 21 4 14 17 0 10 23 4 15 19 0 25 27 5 18 22 Oso 30 6 20 24 0 100 33 7 22 27 The area-capacity data and the depth-discharge data for the proposed detention pond are provided in Appendix C. 7 The pond outlet structure is a concrete riser structure which is 4.5' x 6' in size, 5' high, and with a 3 .5' x 5' opening at its top. There is an 8" wide opening in the front face of the structure with its in vert at Elevation 312 to control the flow. This discharge pipe is a 27" diameter pipe, 190 feet in length, which discharges into an existing stonn sewer inlet. The pipe has a design slope of 0.4%. The storm sewer piping for the detention facility outlet pipe will be RCP meeting the requirements of ASTM C-76, Class III pipe. The top of the pond berm is at Elevation 3 18. The peak flow out of the detention fac ility was detennined by the HEC-1 program. As shown in Table 4, the combined total flow from the detention facility and offsite flow for the post-development condition is less than the pre-development peak flow for the design storm event. Additionally, Table 5 presents the maximum water surface in the pond for each stonn event, as well as the amount of freeboard provided. Exhibit B shows the drainage areas utilized for the design of the detention pond. The pond is designed and will be constructed to allow for the development of the entire site. TABLE 4 -Pre & Post-Development Runoff Comparison -HEC-1 Storm Pre-Development Flow Post-Development Combined Flow (cfs) (cfs) Os 17 17 0 10 21 19 0 25 27 22 0 50 31 24 0 100 35 27 TABLE 5-Summary of Maximum Pond Water Levels CONCLUSIONS Max. Water Surface Elev. Freeboard (ft) 315.56 315.84 316.27 316.58 316.86 Note: Detention Pond Top of Berm Elevation = 318. 0 (ft) 2.44 2.16 1.73 1.42 1.14 The construction of this project will significantly increase the storn1 water runoff from this site. However, the existing and proposed detention ponds will adequately control the peak post-development runoff to that of the pre-development runoff for the design stonn event. No flood damage to downstream landowners is expected as a result of this development. 8 APPENDIX A Storm Sewer Inlet Design Calculations 9 Fox Run Condominiums Grate Inlet Summary Cast Iron Grates -Nyoplast Pedestrian Rated ("Plasti c Inlets") Size Open Area (inches) (in2) 8 20.3 --------- 10 29.7 ----12 51 .0 15 79.3 ---18 87.6 ------- 24 125.2 East Jordan Iron Works Style Size Open Area Number (inches) (in2) V-5708 8x8 37.0 --V-5712 13.5 x 13.5 66.0 V-5716 14.125x14.125 90.0 -------- V-5718 16.75 x 16.75 151 .0 V-5724-1 22.25 x 22.25 268.0 ·------- V-5728 26 x 26 370.0 -------V-5732 30.25 x 30.25 470.0 Inlet Number 101 102 103 104 --- 105 -- 106 -107 108 --- 109 -110 ---11 1 -112 113 114 116 ---- 117 -- 118 119 120 -121 122 - 123 124 125 126 ---127 128 Q = 4.82 *Ag * y 11 ¢ y = (QI (4.82 * A9))2 Where: Q = flow at inlet, cfs Inlet Model number V-5728 V-571 8 V-5728 V5724-1 V-5718 18" 15" 12" 12" 12" 24" --15" --18" -- V-5718 V5724-1 24" --- 24" ---V-5724-1 ---V-5728 ---- 15" -- V-5728 ---12" ---12" -12" A9 = open area of inlet, ft2 y = depth at inlet, ft Actual Design A, Design A9 Ag 50% clogging in 25% clogging in grass areas pavement areas (in2) (in2) (in2) 370.0 -278.2 151.0 -113.5 370.0 -278.2 268.0 -201 .5 151 .0 -113.5 - 87.6 43.8 - 79.3 39.7 - 51 .0 25.5 - 51 .0 25.5 - 51 .0 25.5 -----125.2 62.6 ----------- 79.3 39.7 ------- 87.6 43.8 ------------ 151 .0 -113.5 ---------- 268.0 134.0 - 125.2 62.6 -------- 125.2 62.6 -------- 268.0 -201 .5 --370.0 -278.2 ---79.3 39.7 ------------ 370.0 -278.2 ----- 51.0 25.5 ------------- 51 .0 25.5 -----51 .0 25.5 - 10-Year Storm 0 10 Depth, y (cfs) (ft) (in) 4.65 0.25 3.0 1.68 0.20 2.3 4.71 0.26 3.1 3.37 0.25 3.0 ------ 1.55 0.17 2.0 ------ 0.81 0.31 3.7 -----0.61 0.21 2.5 ------ 0.47 0.31 3.7 ----- 0.54 0.40 4.8 ---0.34 0.16 1.9 -------·- 1.15 0.30 3.6 --------- 0.88 0.44 5.2 ------ 0.94 0.41 5.0 -------·-- 2.42 0.41 4.9 ------ 2.09 0.22 2.6 ------ 1.75 0.70 8.4 ------ 1.21 0.33 4.0 --------3.64 0.29 3.5 ------ 4.98 0.29 3.4 ------ 0.61 0.21 2.5 -------- 5.73 0.38 4.5 ------0.13 0.02 0.3 --------0.47 0.31 3.7 --------0.54 0.40 4.8 --------------- V-5718 151 .0 75.5 -1.82 0.52 6.2 ----------------- 12" 51.0 25.5 -0.47 0.31 3.7 ---------- 12" 51 .0 25.5 -0.47 0.31 3.7 100-Year Storm 0 100 Depth, y (cfs) (ft) (in) 6.26 0.45 5.4 2.27 0.36 4.3 ---6.35 0.47 5.6 4.54 0.45 5.4 --------- 2.09 0.30 3.6 --------- 1.09 0.55 6.6 --------- 0.82 0.38 4.6 -------- 0.64 0.55 6.7 -- 0.73 0.72 8.7 -------- 0.45 0.28 3.4 ------- 1.54 0.54 6.5 ------ 1.18 0.79 9.5 -------- 1.27 0.75 9.0 ----·------ 3.27 0.74 8.9 -------- 2.81 0.39 4.7 ------- 2.36 1.27 15.2 --------- 1.63 0.61 7.3 --------4.90 0.53 6.3 --------- 6.72 0.52 6.2 --------- 0.82 0.38 4.5 ------- 7.72 0.69 8.2 ---------0.18 0.05 0.5 -------- 0.64 0.55 6.7 --------0.73 0.72 8.7 ------ 2.45 0.94 11 .3 --------- 0.64 0.55 6.7 -------- 0.64 0.55 6.7 APPENDIXB Storm Sewer Pipe Design Calculations 11 Fox Run Condominiums Pipe Calculations Inlet Invert Outlet Pipe# Size Length Slope Elev Invert Elev Design Flow (i n) (ft) (%) (ft) (ft) (cfs) 1 27 190.0 0.40 311 .76 311 .00 15 2 27 48.7 0.80 313.40 313.01 24.13 ---- --- 3 27 116.5 0.50 314.80 314.22 17.06 -------- 4 24 233.1 0.50 316.22 315.05 12.94 ----------------5 18 191 .8 0.50 317.68 316.72 5.86 ------------ SA 12 55.0 1.00 317.67 317.12 -----·-----------6 12 93.0 0.50 319.51 319.05 1.55 -----6A 12 35.0 1.00 319.86 319.51 ------------------7 12 87.6 1.50 317.41 316.10 2.43 --------------------8 12 96.2 1.00 318.41 317.45 1.62 -----------------------9 8 41 .7 0.50 318.62 318.41 0.47 ------------------ 10 8 16.3 0.50 318.49 318.41 0.54 ----·------------- 11 12 82.0 2.00 318.86 317.22 2.37 ------------ 12 12 59.7 1.00 319.54 318.94 2.03 ------------13 8 58.4 1.00 320.45 319.87 0.88 ---------14 12 155.7 0.50 319.78 319.00 0.94 --- 15 12 119.3 1.00 316.86 315.67 2.42 ---------------------- 15A 12 8.0 1.00 316.94 316.86 ---------------- 16 12 114.4 1.00 318.00 316.86 2.42 ---------- 16A 12 40.0 1.00 318.50 318.10 --------- 17 18 70.2 0.50 314.70 314.35 5.05 -----18 12 58.5 1.00 315.79 315.21 2.96 ------------------19 12 161 .8 1.00 317.41 315.79 1.75 -------------- 20 12 61 .1 0.50 316.10 315.79 1.21 ------ 21 27 103.3 0.35 313.96 313.60 18.86 --------22 24 219.4 0.35 314.98 314.2 1 9.23 ------------23 18 127.7 0.50 318.66 318.02 5.59 -------------- 24 12 58.9 0.50 319.45 319.16 0.61 --------- -24A 12 57.0 1.00 319.73 319.16 ----- 25 18 49.9 1.50 315.65 314.90 9.63 -- 25A 12 34.0 2.00 318.70 318.02 - 26 12 145.9 1.00 318.70 317.24 3.9 - 26A 12 50.0 2.00 319.02 318.02 - 27 12 51.4 1.00 319.21 318.70 3.77 28 12 37.9 1.00 320.00 319.62 2.83 29 12 12.6 0.60 320.08 320.00 2.29 30 8 121 .3 0.50 320.69 320.08 0.47 31 8 37.8 0.50 319.73 319.54 0.47 10-Year Storm 100-Year Storm V10 % Full Travel Time, tr10 Design Flow V100 % Full Travel Time, tnoo (fps) (sec) (min) (cfs) (fps) (sec) (min) 5.4 65.6 35 0.59 22.00 5.5 100.0 35 0.58 --- 8.4 67.9 6 0.10 32.50 8.2 100.0 6 0.10 ----- 6.5 62.8 18 0.30 22.97 6.8 79.2 17 0.29 --·----------- 6.0 64.4 39 0.65 17.42 5.5 100.0 42 0.71 --------~ ---5 0 63.3 38 0.64 7.90 5.2 80.4 37 0.61 ----------------------------·---3.6 54.0 26 0.43 2.09 3.8 65.6 24 0.41 - - ---------------------------------------6.1 50.8 14 0.24 3.28 6.5 61 .3 13 0.22 ---------------------- 4.7 45.2 20 0.34 2.19 5.1 53.9 19 0.31 ------------------- 2.7 50.5 15 0.26 0.64 2.9 61 .1 14 0.24 ------------------ 2.8 54.9 6 0.10 0.73 2.9 67.0 6 0.09 ----------·--· -- 6.7 46.1 12 0.20 3.17 7.2 54.7 11 0.19 ------------------ 5.0 51 .5 12 0.20 2.72 5.3 61 .9 11 0.19 -------------------------- 4.0 60.0 15 0.24 1.18 4.2 74.3 14 0.23 ---------------- 3.2 40.5 49 0.81 1.27 3.4 47.9 46 0.76 -------------------- 5.2 57.4 23 0.38 3.27 5.5 70.6 22 0.36 ------ ---------- ------- 5.2 57.4 22 0.37 3.27 5.5 70.6 21 0.35 ---------- 4.8 57.4 15 0.24 6.80 5.1 70.5 14 0.23 --- --- 5.4 65.6 11 0.18 3.99 5.6 85.4 10 0.17 -------------- 4.8 47.2 34 0.56 2.36 5.2 56.5 31 0.52 ------------------ 3.4 46.6 18 0.30 1.63 3.6 55.7 17 0.28 ----------------- 5.7 77.8 18 0.30 25.44 6.4 100.0 16 0.27 - --------- 4.9 58.0 45 0.75 12.44 5.2 71 .3 42 0.70 -------- 4.9 61.3 26 0.43 7.54 5.2 76.8 25 0.41 -- - 2.8 32.1 21 0.35 0.82 3.0 37.6 20 0.33 --------- 8.5 61 .1 6 0.10 13.00 9.0 76.5 6 0.09 -------------- 5.6 82.9 26 0.43 5.28 6.7 100.0 22 0.36 ------------- 5.6 79.9 9 0.15 5.10 6.5 100.0 8 0.13 ---- 5.4 63.6 7 0.12 3.82 5.6 81 .0 7 0.11 ----- 4.2 65.6 3 0.05 3.09 4.3 85.3 3 0.05 ----- 2.7 50.5 45 0.75 0.64 2.9 61 .1 42 0.70 ---- 2.7 50.5 14 0.23 0.64 2.9 61 .1 13 0.22 Inlet 113 0.94 .!, Inlet 108 0.47 Pipe 14 0.94 .!, .!, Inlet 1091 0.54 Pipe 9 0.47 Inlet 104 3.37 J, J, .!, Pipe 10 0.54 Inlet 107 0.61 Pipe 5 5.86 J, J, Pipe 8 1.62 Inlet 103 4.71 J, J, Inlet 106 0.81 Pipe 4 12.94 .!, J, Pipe 7 2.43 Inlet 102 1.68 J, Pipe 3 17.05 J, Inlet 101 4.65 J, II Pipe 2 24.12 II (Into Detention Pond) Inlet 1051 1.55 .!, Pipe 6 ' 1.55 Inlet 114 2.42 J, Pipe 16 I 2.42 J, Pipe 15 1 2.42 Fox Run Condominiums Pipe Flow Diagram 0 10 (cfs) Inlet 1121 0.88 J, Pipe 13 I 0.88 J, Inlet 111 I 1.15 .!, Pipe 12 1 2.03 .!, lnlet110 0.34 J, Pipe 11 1 2.37 Inlet 1171 J, Pipe 19 I Inlet 127 0.47 J, Pipe 30 0.47 J, Inlet 126 1.82 J, Pipe 29 2.29 J, Inlet 125 0.54 J, Inlet 1281 0.47 Pipe 28 2.83 Inlet 121 , 0.61 .!, .!, .!, Pipe 31 0.47 Inlet 124 0.47 Pipe 24 0.61 .!, J, Pipe 27 3.77 Inlet 120 4.98 J, J, Inlet 123 0.13 Pipe 23 • 5.59 J, J, Inlet 118 1.21 Pipe 26 3.90 Inlet 119 3.64 J, J, J, 1.75 Pipe 20 I 1.21 Inlet 122 5.73 Pipe 22 9.23 J, J, J, 1.75 Pipe 18 1 2.96 Pipe 25 ' 9.63 June Box 1 J, J, Inlet 1161 2.09 Pipe 21 18.86 J, J, Pipe 17 5.05 Inlet 1151 5.73 .!, II Into Exist. 29.64 II Inlet 113 1.27 J, Inlet 108 0.64 Pipe 14 1.27 Inlet 1051 2.09 J, J, J, Inlet 1091 0.73 Pipe 9 0.64 Inlet 104 4.54 Pipe 6 2.09 J, J, J, Pipe 10 0.73 Inlet 107 0.82 Pipe 5 7.90 -!, -!, Pipe 8 2.19 Inlet 1031 6.35 J, J, Inlet 106 1.09 Pipe 4 17.42 J, J, Pipe 7 3.28 Inlet 102 2.27 Inlet 1141 3.27 J, -!, Pipe 3 l 22 .97 Pipe 16 I 3.27 -!--!- Inlet 101 6.26 Pipe 15 1 3.27 -!- II Pipe 2 32.50 11 (Into Detention Pond) Fox Run Condominiums Pipe Flow Diagram 0 100 (cfs) Inlet 112 1.18 -!- Pipe 13 1.18 J, Inlet 111 1.54 J, Pipe 12 1 2.72 J, Inlet 110 0.45 -!, Pipe 11 [ 3.17 Inlet 1171 -!, Pipe rn I Inlet 1281 0.64 -!- Pipe 31 0.64 Inlet 1181 1.63 J, 2.36 Pipe 20 I 1.63 -!, 2.36 Pipe 18 I 3.99 J, Inlet 1161 2.81 -!- Pipe 17 6.80 Inlet 127 0.64 -!, Pipe 30 0.64 -!, Inlet 126 2.45 -!, Pipe 29 3.09 -!, Inlet 125 0.73 -!- Pipe 28 , 3.82 Inlet 121 : 0.82 -!--!- Inlet 124 0.64 Pipe 24 0.82 J, -!- Pipe 27 5.10 Inlet 120 6.72 J, J, Inlet 123 0.18 Pipe 23 j 7.54 -!-J, Pipe 26 5.28 Inlet 119 4.90 -!--!- Inlet 122 7.72 Pipe 22 12.44 -!, -!, Pipe 25 13.00 June Box 1 J, Pipe 21 25.44 J, Inlet 1151 7.72 -!- II into Exist. I 39.96 II Pipe 1 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Veloc ity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 27 .0000 in 15 .0000 cfs 0.0040 ft/ft 0. 0130 17.7030 in 3.9761 ft2 2.7632 ft2 50.9596 in 84.8230 in 5.4285 fps 7.8081 in 65.5667 % 19.5873 cfs 4 .9263 fps Pipe 1 -100 Year Storm Culvert Calculator Entered Data: Shape .......................... . Number of Barrels .............. . Solving for .................... . Chart Number ................... . Scale Number ................... . Chart Description .............. . Scale Description .............. . Overtopping .................... . Flowrate ....................... . Manning ' s n .................... . Roadway Elevation .............. . Inlet Elevation ................ . Outlet Elevation ............... . Diameter ....................... . Length ......................... . Entrance Loss .................. . Tailwater ...................... . Computed Results: Headwater ...................... . Slope .......................... . Velocity ....................... . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PI PE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 22.0000 cfs 0. 0130 318.0000 ft 311.7600 ft 311.0000 ft 27.0000 in 190.0000 ft 0.0000 2.2500 ft 314.7304 ft Inlet Control 0.0040 ft/ft 5.5331 fps Pipe 2 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape ..... . Solving for Diameter Flowrate .. . Slope ..... . Manning's n Computed Results: Depth ........ . Area ............... . Wetted Area ....... . Wetted Perimeter Perimeter . . . . . . . . ....... . Ve locity . . . . . . . . . .... . Hydraulic Radius ...... . Percent Full ................... . Full flow Flowrate ..... . Full flow velocity ........ . Circular Depth of Flow 27.0000 in 24. 1300 cfs 0.0080 ft/ft 0.0120 18.3363 in 3.9761 ft2 2 .8751 ft2 52.3039 in 84.8230 in 8.3929 fps 7.9154 in 67 .9122 % 30.0091 cfs 7.5474 fps Pipe 2 -100 Year Storm Culvert Calculator Entered Data: Shape ................ . Number of Barrels Solving for ..... . Chart Number .... . Scale Number ..... Chart Description . Scale Description ... Overtopping .. Flowrate .......... . Manning's n ....... . Roadway Elevation .. Inlet Elevation ........ . Outlet Elevation .. . Diameter ..... . Length ........ . Entrance Loss .. Tailwater ... Computed Results: Headwater Slope .... Velocity . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PIPE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 32.5000 cfs 0.0120 319.9000 ft 313.4000 ft 313.0000 ft 27.0000 in 48.7000 ft 0.0000 2.2500 ft 317 .5574 ft Inlet Control 0.0082 ft/ft 8.1739 fps Pipe 3 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow veloci t y ............. . Circular Depth of Flow 27.0000 i n 17.0600 cfs 0.0050 ft/ft 0.0120 16 .9491 in 3 .9761 ft2 2.6276 ft2 49.3871 in 84 .8230 in 6.4925 fps 7.6615 in 62 .7746 % 23 .7243 cfs 5.9667 fps Pipe 3 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Veloci t y ....................... . Hydraulic Radiu s ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 27.0000 in 22 .9700 c f s 0.0050 ft/ft 0.0120 21.3947 in 3.9761 ft2 3.3790 ft2 59.2764 in 84.8230 in 6.7979 fps 8.2085 in 79.2397 % 23.7243 cfs 5.9667 fps Pipe 4 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape ..... . Solving for Diameter Flowrate .. . Slope ..... . Manning's n Computed Results: Depth ..... . Area ......... . Wetted Area .... . Wetted Perimeter Perimeter ...... . Velocity ....... . Hy draulic Radius Percent Full ...... . Full flow Flowrate Full flow velocity . Circular Depth of Flow 24.0000 in 12.9400 cfs 0.0050 ft/ft 0.0120 15.4602 in 3.1416 ft2 2.1394 ft2 44 .7192 in 75.3982 in 6 .0484 fps 6.8891 in 64.4175 % 17.3295 cfs 5.5161 fps Pipe 4 -100 Year Storm Culvert Calculator Entered Data: Shape ............. . Number of Barrel s .. Solving for ....... . Chart Number ....... . Scale Number ....... . Chart Description Scale Description Overtopping .. . Flowrate ........ . Mann ing's n ..... . Roadway Elevat ion Inlet Elevation .. Outlet Elevation . Diameter ........ . Length .......... . Entrance Loss .... . Tailwater ....... . Computed Results: Headwater .. . Slope ....... . Velocity .... . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PI PE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 17.4200 cfs 0.0120 320.3000 ft 316.2000 ft 315.0400 ft 24.0000 in 233.1000 ft 0.0000 2.0000 ft 318.8251 ft Inlet Control 0.0050 ft/ft 5.5450 fps Pipe 5 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n ................ . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 18.0000 in 5.8600 cfs 0.0050 ft/ft 0.0120 11.3971 in 1 .7671 ft2 1.1796 ft2 33.1271 in 56.5487 in 4.9677 fps 5 .1277 in 63.3173 % 8.0467 cfs 4.5535 fps Pipe 5 -100 Year Storm Ma nning Pipe Calculator Gi ven Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Ful l flow Fl owrate ............. . Full flow velocity ............. . Fox Run Condomi nium s College Station, Texas Circular Depth of Flow 18 .0000 in 7.9000 cfs 0.0050 ft/ft 0.0120 14.4651 in 1 .7671 ft2 1.5220 ft2 40.0208 in 56.5487 in 5.1904 fps 5.4765 in 80.3619 % 8 .0467 cfs 4.5535 fps Pipe 6 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving f or .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Circular Depth of Flow 12.0000 in 1.5500 cfs 0.0050 ft/ft 0. 0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4762 in Area ........................... . Wetted Area .................... . Wetted Peri meter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radiu s ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0.4323 ft2 19.8029 in 37 .6991 in 3.5851 fps 3.1438 in 53.9682 % 2 .7292 cfs 3.4750 fps Pipe 6 -100 Year Storm Manning Pipe Calculator Given I nput Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12.0000 in 2.0900 cfs 0.0050 ft/ft 0.0120 7.8679 in 0.7854 ft2 0.5458 ft2 22.6485 in 37.6991 in 3.8292 fps 3 .4702 in 65.5658 % 2.7292 cfs 3 .475 0 fps Pipe 7 -10 Year Sto rm Manni ng Pipe Calc ulator Given Inpu t Data: Shape .......................... . Solv ing f or .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning ' s n .................... . Computed Results: Circular Depth of Flow 12.0000 i n 2.4300 cfs 0 .0150 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . 0991 in Area ........................... . Wetted Are a .................... . Wetted Perimeter ............... . Peri meter ...................... . Velo city ....................... . Hy draulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0.4010 ft2 19 .0478 i n 37 .6991 in 6.0605 fps 3.0312 in 50 .8260 % 4 .7272 cfs 6 .0188 fps Pipe 7 -100 Year Storm Manni ng Pipe Calculator Given Input Data : Shape .......................... . Solv ing for .................... . Diameter ....................... . Flowrat e ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hy draulic Radius ............... . Per cent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums Co llege Stat ion , Texas Circular De p th of Flow 12.0000 in 3 .2800 cfs 0 .0150 ft /ft 0 .0120 7.3546 i n 0 .7854 ft2 0 .5046 ft2 21.5823 in 37.6991 in 6 .5000 fps 3.3669 in 61.2883 % 4 .7272 c fs 6.0188 fps Pipe 8 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................. . Computed Results : Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 in 1.6200 cfs 0.0100 ft/ft 0.0120 5.4234 in 0 .7854 ft2 0.3447 ft2 17 .6946 in 37.6991 in 4.6994 fps 2.8054 in 45.1950 % 3.8597 cfs 4.9143 fps Pipe 8 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 2.1900 cfs 0.0100 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4725 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full . . . . . . . . . ......... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas 0.7854 ft2 0.4320 ft2 19.7956 in 37.6991 in 5.0690 fps 3.1428 in 53.9376 % 3.8597 cfs 4.9143 fps Pipe 9 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 8.0000 in 0.4700 cfs 0.0050 ft/ft 0.0120 Depth ........................... 4.0364 in Area ........................ · · · · Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percen t Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.3491 ft2 0.1766 ft2 12.6392 in 25 .1327 in 2.6621 fps 2.0115 in 50.4550 % 0.9257 cfs 2.6519 fps Pipe 9 -100 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solvin g for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning 's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radiu s ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station , Texas Circular Depth of Flow 8.0000 in 0.6400 cfs 0.0050 ft/ft 0 .0120 4.8914 in 0.3491 ft2 0.2236 ft2 14 .3643 in 25 .1327 in 2.8617 fps 2.2420 in 61.1428 % 0.9257 cfs 2.6519 fps Pipe 10 -10 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 8.0000 in 0 .54 00 cfs 0.0050 ft/ft 0.0120 Depth ........................... 4.3891 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perime ter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.3491 ft2 0.1961 ft2 13 .3457 in 25.1327 in 2.7535 fps 2.1161 in 54.8633 % 0.9257 cfs 2 .6519 fps Pipe 10 -100 Year Storm Manning Pipe Calculator Given Input Dat a : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Circular Depth of Flow 8 .0000 in 0.7300 cfs 0.0050 ft/ft 0.0120 Depth ........................... 5.3565 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums Co llege Statio n, Texas 0.3491 ft2 0.2484 ft2 15.3343 in 25.1327 in 2.9385 fps 2.3329 in 66.9563 % 0 .9257 cfs 2.6519 fps Pipe 11 -10 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Circular Depth o f Flow 12.0000 in 2.3700 cfs 0 .0200 ft/ft 0 .0 1 20 Depth ........................... 5.5289 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0.3535 ft2 17 .9064 in 3 7.6991 in 6 .7047 fps 2 .8426 in 46.0744 % 5.4584 cfs 6.9499 fps Pipe 11 -100 Year Storm Manning Pi pe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning ' s n .................... . Computed Results: Circular Depth of Flow 12 .0000 in 3 .1700 cfs 0 .0200 ft /ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 5655 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condo mini um s College Station, Texas 0.7854 ft2 0.4398 ft2 19.9822 in 37.6991 in 7.2086 fps 3.1690 in 54.7124 % 5.4584 cfs 6.9499 fps Pipe 12 -10 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solving for .................... . Diameter ..................... . Flowrate ..................... . Slope ........................ . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 i n 2.0300 cfs 0.0100 ft/ft 0.0120 Depth ........................... 6.1827 in Area ....................... · · · · · Wetted Area .................... . We tted Perimeter ............... . Perimeter ...................... . Velocit y ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0 .7854 ft2 0.4079 ft2 19.2151 in 37.6991 in 4.9764 fps 3.0570 in 51.5227 % 3 .8597 cfs 4 .9143 fps Pipe 12 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape ......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12.0000 in 2.7200 cfs 0.0100 ft/ft 0.0120 7 .4311 i n 0 .7854 ft2 0.5108 ft2 21.7397 in 37 .6991 in 5.3248 fps 3.3836 in 61.9261 % 3.8597 cfs 4 .9143 fps Pipe 13 -10 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning 's n .................... . Computed Results: Circular Depth of Flow 8.0000 in 0 .8800 cfs 0.0100 ft/ft 0.0120 Depth ........................... 4.8017 in Area ........................... . Wetted Area .................... . Wetted Perimet er ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percen t Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.3491 ft2 0.2188 ft2 14.1808 in 25.1327 in 4.0224 fps 2.2216 in 60.0216 % 1.3091 cfs 3.7503 fps Pipe 13 -100 Year Storm Manning Pipe Calculator Giv en Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydrau lic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow v elocity ............. . Fox Run Condominiums College Station , Texas Circular Depth of Flow 8.0000 in 1.1800 cfs 0.0100 ft/ft 0 .0120 5.9411 in 0.3491 ft2 0.2780 ft2 16.6197 in 25.1327 in 4.2450 fps 2.4085 in 74.2632 % 1.3091 cfs 3.7503 fps Pipe 14 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perime t er ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 in 0.9400 cfs 0 .0050 ft/ft 0.0120 4.8577 in 0.7854 ft2 0.2981 ft2 16.5509 i n 37.6991 in 3.1535 fps 2 .5935 i n 40.4807 % 2.7292 cfs 3.4750 fps Pipe 14 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .................. . Area ....................... ·. · · · Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow ve locity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12.0000 in 1.2700 cfs 0.0050 ft/ft 0.0120 5 .7535 in 0.7854 ft2 0.3722 ft2 18.3564 in 37.6991 in 3.4125 fps 2.9195 in 47.9456 % 2.7292 cfs 3.4750 fps Pipe 15 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n ............. . Computed Results: Circular Depth of Flow 12.0000 in 2 .4200 cfs 0.0100 ft/ft 0.0120 Depth ........................... 6.8871 in Area ....................... · · · · · Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow ve locity ............. . 0.7854 ft2 0.4664 ft2 20 .6303 in 37.6991 in 5.1892 fps 3.2552 in 57.3926 % 3.8597 cfs 4 .9143 fps Pipe 15 -100 Year Storm Manning Pipe Calculator Given Input Data : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 3.2700 cfs 0.0100 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4770 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocit y ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas 0.7854 ft2 0.5931 ft2 23.9563 in 37.6991 in 5.5135 fps 3.5650 i n 70.6415 % 3 .8597 cfs 4.9143 fps Pipe 16 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 2.4200 cfs 0.0100 ft/ft 0.0120 Depth ........................... 6.8871 in Area ......................... -.. Wetted Area .................... . Wet t ed Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0.4664 ft2 20.6303 in 37.6991 in 5.1892 fps 3.2552 in 57.3926 % 3.8597 cfs 4.9143 fps Pipe 16 -100 Year Storm Manning Pipe Calculat or Given Inpu t Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12.0000 in 3.2700 c f s 0.0100 ft /ft 0.0120 8.4770 in 0.7854 ft2 0.5931 ft2 23.9563 in 37.6991 in 5.5135 fps 3.5650 in 70 .6415 % 3.8597 cfs 4.9143 fps Pipe 17 -10 Year S t orm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perime ter ...................... . Velocit y ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow veloci t y ............. . Circular Depth of Flow 18 .0000 in 5.0500 cfs 0.0050 ft/ft 0. 0120 10.3369 in 1.7671 ft2 1.0501 ft2 30 .9581 in 56 .5487 in 4.8092 fps 4.8843 in 57.4273 % 8.0467 cfs 4 .5535 fps Pipe 17 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results : Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Veloci t y ....................... . Hydraulic Radius ............... . Percent Full ................... . Ful l flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 18.0000 i n 6.8000 cfs 0.0050 ft /ft 0.0120 12 .6905 in 1.7671 ft2 1.3316 ft2 35 .8 797 in 56.5487 in 5.1066 fps 5.3443 in 70.5030 % 8.0467 cfs 4.5535 fps Pipe 18 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Circular Depth of Flow 12.0000 in 2 .9600 cfs 0.0100 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. 8760 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0 .5464 ft2 22.6655 in 37.6991 in 5.4168 fps 3 .4717 in 65.6331 % 3.8597 cfs 4. 9143 fps Pipe 18 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydrau lic Radiu s ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12 .0000 in 3.9900 cfs 0.0100 ft/ft 0.0120 10.2447 in 0.7854 ft2 0 .7142 ft2 28.2801 in 37.6991 in 5.5869 fps 3.6365 in 85.3724 % 3.8597 cfs 4.9143 fps Pipe 19 -10 Year Storm Ma nning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning 's n .................... . Computed Results: Circular Depth of Flow 12 .0000 in 1.7500 cfs 0 .0100 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6678 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0.7854 ft2 0 .3650 ft2 18.1849 in 37.6991 in 4.7941 fps 2.8906 in 47 .2320 % 3.8597 cfs 4.9143 fps Pipe 19 -100 Year Storm Manning Pipe Calcula tor Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wett ed Area .................... . Wett e d Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraul ic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 12.0000 in 2.3600 c f s 0.0100 ft/ft 0.0120 6 .7790 in 0 .7854 ft2 0.4574 ft2 20.4119 in 37.6991 in 5.1592 fps 3.2270 in 56.4915 % 3.8597 cfs 4 .9143 fps Pipe 20 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diame t er ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results : Circular Depth of Flow 12.0000 in 1.2100 cfs 0.0050 ft/ft 0.0120 Depth ........................... 5 .5953 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Veloc i ty ....................... . Hydraulic Radi us ............... . Percent Full ................... . Full flow Flowrate ............. . Ful l flow vel ocity ............. . 0.7854 ft2 0.3590 ft2 18.0396 in 37.6991 in 3.3705 fps 2.8657 in 46 .6276 % 2.7292 cfs 3.4750 fps Pipe 20 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Sol v ing for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Mann i n g's n .................... . Comput ed Results: Circular Depth of Flow 12 .0000 in 1.6300 c f s 0.0050 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 6802 in Area ........................... . Wetted Area .................... . Wett ed Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydrau lic Rad ius ............... . Percent Full ................... . Full f low Fl owrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas 0 .7854 ft2 0 .4493 ft2 20 .2129 in 37.6991 in 3.6282 fps 3.2006 in 55.6682 % 2.7292 cfs 3.4750 fps Pipe 2 1 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 27.0000 in 18.8600 cfs 0.0035 ft/ft 0 .0120 21 .0109 in 3.9761 ft2 3.3199 ft2 58 .3417 in 84.8230 in 5.6809 fps 8.1942 in 77.8183 % 19.8491 cfs 4.9921 fps Pipe 21 -100 Year Storm Culv ert Calculator Entered Data: Shape .......................... . Number of Barrels .............. . Solving for .................... . Chart Number ................... . Scale Number ................... . Chart Description .............. . Scale Description .............. . Overtopping .................... . Flowrate ....................... . Manning' s n .................... . Roadway Elevation .............. . Inlet Elevation ................ . Outlet Elevation ............... . Diameter ....................... . Length ......................... . Entrance Loss .................. . Tailwater ...................... . Computed Results: Headwater ...................... . Slope .......................... . Velocity ....................... . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PIPE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 25.4400 cfs 0.0120 321.5000 ft 313. 9600 ft 313. 6000 ft 27 .0000 in 103.3000 ft 0.0000 2 .2500 ft 317 .0929 ft Inlet Control 0.0035 ft/ft 6.3983 fps Pipe 22 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 24.0000 in 9.2300 cfs 0.0035 ft/ft 0.0120 13.9080 in 3.1416 ft2 1.8875 ft2 41.5314 in 75.3982 in 4.8902 fps 6.5443 in 57.9500 % 14 .4989 cfs 4.6151 fps Pipe 22 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solvi ng for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydrau lic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Fl ow 24.0000 in 12.4400 cfs 0.0035 ft/ft 0.0120 17.1222 in 3.1416 ft2 2 .3978 ft2 48.2833 in 75 .3982 in 5.1881 fps 7.1512 in 71.3425 % 14.4989 cfs 4.6151 fps Pipe 23 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 18.0000 in 5.5900 cfs 0.0050 ft/ft 0.0120 11.0407 in 1.7671 ft2 1.1365 ft2 32.3916 in 56.5487 in 4.9188 fps 5.0522 in 61. 3373 % 8.0467 cfs 4.5535 fps Pipe 23 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 18.0000 in 7.5400 c f s 0.0050 ft/ft 0.0120 13.8285 in 1.7671 ft2 1.4568 ft2 38 .4674 in 56.5487 in 5.1758 fps 5.4533 in 76.8250 % 8.0467 c f s 4.5535 fps Pipe 24 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 in 0.6100 cfs 0 .0050 ft/ft 0.0120 3.8558 in 0.7854 ft2 0.2179 ft2 14.4642 i n 37.6991 in 2.7995 fps 2.1693 in 32.1318 % 2.7292 cfs 3.4750 fps Pipe 24 -100 Year Storm Manning Pipe Calculator Given I nput Data : Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 0.8200 cfs 0.0050 ft/ft 0.0120 Depth ........................... 4.5103 in Area ........................... . We tted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas 0.7854 ft2 0.2698 ft2 15.8386 in 37.6991 in 3.0388 fps 2.4533 in 37.5855 % 2.7292 c f s 3.4750 fps Pipe 25 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 18.0000 in 9.6300 cfs 0 .0150 ft/ft 0.0120 11.0012 in 1.7671 ft2 1.1316 ft2 32.3105 in 56.5487 in 8.5097 fps 5.0435 in 61.1178 % 13.9372 cfs 7 .8869 fps Pipe 25 -100 Year Storm Manning Pipe Calculat or Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrat e ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wett ed Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radiu s ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 18 .0000 in 13 . 0000 cfs 0.0150 ft/ft 0.0120 13. 7714 in 1.7671 ft2 1 .4 507 ft2 38.3324 in 56.5487 in 8.9609 fps 5.4499 in 76 .5077 % 13.9372 cfs 7.8869 fps Pipe 26 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape ................... . Solving for .................. . Diameter ....................... . Flowrate ....................... . Slope ......................... . Manning's n ................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Ve locity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 i n 3.9000 cfs 0.0100 ft/ft 0 .0120 9 .9531 i n 0.7854 ft2 0.6964 ft2 27 .4809 in 37 .6991 in 5.6000 fps 3 .6493 in 82.9422 % 3.8597 cfs 4.9143 fps Pipe 26 -100 Year Storm Culv ert Calculator Entered Data: Shape .......................... . Number of Barrels .............. . Solving for .................... . Chart Number ................... . Scale Number ................... . Chart Description .............. . Scale Description .............. . Ov ertopping .................... . Flowrate ....................... . Manning's n .................... . Roadway Elevation .............. . Inlet Elevation ................ . Outlet Elev a t ion ............... . Diameter ....................... . Length ......................... . Entrance Loss .................. . Tailwater ...................... . Compute d Results: Headwater ...................... . Slope .......................... . Ve locity ....................... . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PIPE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 5 .2800 cfs 0.0120 322.5000 ft 318.6900 ft 317.2400 ft 12.0000 in 145.9000 ft 0.0000 1 .0000 ft 321 .6595 ft Outlet Control 0.0099 ft /ft 6 .722 7 fps Pipe 27 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 in 3.7700 cfs 0.0100 ft/ft 0.0120 9.5929 in 0.7854 ft2 0.6731 ft2 26.5539 in 37.6991 in 5.6009 fps 3.6502 in 79.9410 % 3.8597 cfs 4.9143 fps Pipe 27 -100 Year Storm Culvert Calculator Entered Data: Shape .......................... . Number of Barrels .............. . Solving for .................... . Chart Number ................... . Scale Number ................... . Chart Description .............. . Scale Description .............. . Overtopping .................... . Flowrate ....................... . Manning ' s n .................... . Roadway Elevation .............. . Inlet Elevation ................ . Outlet Elevation ............... . Diameter ....................... . Length ......................... . Entrance Loss .................. . Tailwater ...................... . Computed Results: Headwater ...................... . Slope .......................... . Velocity ....................... . Fox Run Condominiums College Station, Texas Circular 1 Headwater 1 1 CONCRETE PIPE CULVERT; NO BEVELED RING ENTRANCE SQUARE EDGE ENTRANCE WITH HEADWALL Off 5.1000 cfs 0.0120 322 .7500 ft 319 .2000 ft 318 .6900 ft 12.0000 in 51.4000 ft 0.0000 1.0000 ft 321.5432 ft Inlet Control 0 .0099 ft/ft 6 .4935 fps Pipe 28 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocit y ....................... . Hy draulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 12.0000 in 2 .8300 cfs 0.0100 ft/ft 0.0120 7.6335 in 0.7854 ft2 0.5271 ft2 22 .1583 in 37.6991 in 5 .3688 fps 3.4256 in 63 .6124 % 3.8597 cfs 4.9143 fps Pipe 28 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning ' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 3.8200 cfs 0 .0100 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 . 7253 i n Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas 0.7854 ft2 0 .6818 ft2 26.8881 in 37.6991 in 5.6024 fps 3.6517 in 81.0445 % 3 .8597 cfs 4.9143 fps Pipe 29 -10 Year Storm Manning Pipe Calculator Giv en Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning' s n .................... . Computed Results: Circular Depth of Flow 12.0000 in 2.2900 cfs 0.0060 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. 8692 in Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hy draulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . 0 .7854 ft2 0 .5459 ft2 22.6511 in 37 .6991 in 4.1949 fps 3.4705 in 65.5763 % 2.9897 cfs 3.8066 fps Pipe 29 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station , Texas Circular Depth of Flow 12 .0000 in 3.0900 cfs 0 .0060 ft/ft 0.0120 10 .2418 in 0.7854 ft2 0.7140 ft2 28.2719 in 37.6991 in 4.3277 fps 3.6367 in 85.3480 % 2.9897 cfs 3.8066 fps Pipe 30 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 8.0000 in 0.4700 cfs · 0.0050 ft/ft 0.0120 4.0364 i n 0.3491 ft2 0.1766 ft2 12 .6392 in 25.1327 in 2.6621 fps 2.0115 in 50 .4550 % 0.9257 cfs 2.6519 fps Pipe 30 -100 Year St orm Manning Pipe Calculator Given Input Dat a: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Mann i ng's n .................... . Computed Results: Circular De p th of Fl ow 8 .0000 in 0.6400 c f s 0.0050 ft/ft 0.0120 Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. 8914 in Area ........................... . Wett e d Area .................... . Wett ed Perime t er ............... . Perimeter ...................... . Velocity ....................... . Hydrau lic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow v e l ocity ............. . Fox Run Condominiu ms College Station, Texas 0.3491 f t 2 0.2236 f t 2 14.3643 in 25. 1327 i n 2.8617 fps 2.2420 i n 61.1428 % 0.9257 cfs 2.6519 fps Pipe 31 -10 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning's n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraulic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Circular Depth of Flow 8.0000 in 0.4700 cfs 0.0050 ft/ft 0.0120 4.0364 in 0.3491 ft2 0.1766 ft2 12.6392 in 25.1327 in 2.6621 fps 2.0ll5 in 50.4550 % 0 .9257 cfs 2.6519 fps Pipe 31 -100 Year Storm Manning Pipe Calculator Given Input Data: Shape .......................... . Solving for .................... . Diameter ....................... . Flowrate ....................... . Slope .......................... . Manning ' s n .................... . Computed Results: Depth .......................... . Area ........................... . Wetted Area .................... . Wetted Perimeter ............... . Perimeter ...................... . Velocity ....................... . Hydraul ic Radius ............... . Percent Full ................... . Full flow Flowrate ............. . Full flow velocity ............. . Fox Run Condominiums College Station, Texas Circular Depth of Flow 8.0000 in 0.6400 cfs 0.0050 ft/ft 0.0120 4.8914 in 0 .3491 ft2 0 .2236 ft2 14.3643 in 25.1327 in 2 .8617 fps 2.2420 in 61.1428 % 0.9257 cfs 2.6519 fps APPENDIXC Detention Pond Data 46 Fox Run Condominiums SCS CU RVE NUMBER CALCULATIONS Area flowing offsite Area -Ac. 0.820 sq. mi. 0.00 13 Weighted Land Use Area, Ac. CN II CN Pavement 0.280 98 33.5 Sidewalks 0.000 98 0.0 Pool Area 0.000 98 0.0 Buildings 0.000 98 0.0 Landscaping 0.540 80 52.7 Total -CN II 0.82 86.1 Rest of site Area -Ac. 8.360 sq . mi. 0.0131 Weighted Land Use Area, Ac. CN II CN Pavement 5.920 98 69.4 Sidewalks 0.000 98 0.0 Pool Area 0.000 98 0.0 Buildings 0.000 98 0.0 Landscaping 2.440 80 23.3 Total -CN II 8.36 92.7 Elevation Depth Area (ft) (ft) (ft2 ) 313 485 1.0 314 3,721 2.0 315 4,684 3.0 316 5,748 4.0 317 6,912 5.0 318 8,177 Fox Run Condomin iums Detention Pond Area -Capacity Data 90% Volume Cumulative Area Volume (ft2) (ft3 ) (ft3) 436.5 1,665 1,665 3348.9 3,774 5,439 4215.6 4,686 10, 125 5173.2 5,689 15,814 6220.8 6,782 22,596 7359.3 Storage Depth vs. Volume Area 90% Area (acres) (acres) 0.011 0.010 0.085 0.077 0.108 0.097 0.132 0.119 0.159 0.143 0.188 0.169 25 ,000 .---------------------------~ 20,000 (.) :.c 15,000 -- ---- :J (.) -Q) § 10,000 r-------------c::;;-------------------j 0 > 0 1.0 2.0 3.0 Depth (ft) 4.0 5.0 Elevation Depth (ft) (ft) 31 2 0.0 31 3 1.0 314 2.0 315 3.0 316 4.0 317 5.0 318 6.0 ID= 3.5' x 5' box Fox Run Condominiums Detention Pond Depth -Discharge Data 8" slot1 Outlet2 Weir Flow Pipe Flow (cfs) (cfs) 0 - 2.05 - 5.79 - 10.63 21 .50 16.37 26.90 22.88 31 .50 30.08 35.40 Maximum Outlet Structure Discharge (cfs) 0.00 2.05 5.79 10.63 16.37 22 .88 35.40 8" wide vertical slot, FL = 312 .00 Top of structure= 317.00 Flow over top exceeds 27" RC P flow 40.00 35.00 -~ 30.00 0 -3: 25.00 0 LL Q) 20.00 C> ... ~ 15.00 0 -~ 10.00 0 5.00 0.00 0.0 1.0 Rating Curve for Outlet Structure Depth vs. Discharge 2.0 3.0 Depth (ft) 4.0 (flow thru slot) " (flow thru 27" pipe) 5.0 6.0 APPENDIXD Time of Concentration Calculations 50 Time of Concentration: For Sheet Flow: Time of Concentration Calculations Tc = T1(shccl now)+ T1(conccnlralcd shccl llow) 0.007 (n L)°-8 (Pz)o.s so.4 where: T1 =Travel Time, minutes where: T1 =travel time, hours n =Manning's roughness coefficient L = flow length, feet P2 = 2-year, 24-hour rainfall = 4.5" s = land slope, ft/ft For Shallow Concentrated Flow: T, =LI (60*V) where: T1 = travel time, minutes V =Velocity, fps (See Fig 3-1) L = flow length, feet Pre-Development Conditions -Drainage Area #101 Sheet Flow: Flow length= 300' = L Slope = 1.2% n = 0.15 , short grass prairie P2 = 4.5" T1 = 0.007 (0.15 * 300)0·8 (4.5)05 (0.012)04 = 0.407 hours = 24.4 minutes Shallow Concentrated Flow: Flow length = 518' = L Slope= 1.2% For unpaved surface at 1.2%, Velocity (V) = 1.78 fps (see Fig. 3-1) ~ = 518' I (60*1.78) = 4.9 minutes Tc= 24.4 + 4.9 = 29.3 minutes .µ <+--+-' <+- CV a. 0 VI CV VI s.... ::s 0 u s.... CV ..... .., 3: 3·2 .50 .20 - .10 .06 .04 .02 - .01 - .005 I 1 j J I ' I I ' , I 0 :,..q, L ,_ "J;1 ' ~ .:,../ ~~ Q.'tY I I I J I } I 2 ' I I 4 I I I I I I I I 6 J I ' J ' I Average velocity, ft/sec ' ' , ,, ' I I I , I I 10 , I . I Fi1eu~ :1·1.-Av~raic" vdociti~' for cslimatinic lmvd lim~ for ~hallow conc.,nlral~d Oow. (210-VI-TR-55. Second Ed., June 198Gl I 20 EXHIBIT A Pre-Development Drainage Area Map 53 EXHIBITB Post-Development Drainage Area Map 55