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Welcome to WinPond Training Exercise #1

Welcome to WinPond Training Exercise #1. Exercise #1.

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Welcome to WinPond Training Exercise #1

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  1. Welcome to WinPond Training Exercise #1

  2. Exercise #1 • Mr. R. B. Trout wants a grade stabilization structure to stop the gully erosion and provide livestock water for field #1 on his property in Washington County, TX. Location is 4.4 miles SE of Independence, TX. This will be a low hazard pond. • The Elevation-Surface Area data in acres: 85.5 – 0.0 89.5 – 0.3 96.4 – 1.20 100.0 – 4.80 104.3 – 10.80 106.0 – 11.80 CNTSC-WinPond Workshop Exercise #1

  3. Exercise #1 • The drainage area data: Total Drainage Area: 103.0 Acres Land Use: Pasture-75.0 Acres HSG-C-50.0 Acres-Good HSG-D-25.0 Acres-Good Woods-28.0 Acres HSG-B-28.0 Acres-Fair Average Watershed Slope-3.2% Flow Length-3000 Ft. • The head cut is 98.0 Elevation. Normal pool should be 1.0 ft above the head cut. CNTSC-WinPond Workshop Exercise #1

  4. Exercise #1 • Auxiliary Spillway Design Storm-25 yr-24 hr-8.95 inches. • Allowable velocity in the Auxiliary Spillway-5.0 FPS • Auxiliary Spillway velocity without a pipe is 5.7 FPS • The Principal Spillway Design Storm will be 7.5 inches for a 10 yr-24 hr storm. CNTSC-WinPond Workshop Exercise #1

  5. Exercise #1 • Inlet Auxiliary Spillway Dimensions: • Length 1=165 ft.-2.5% • Length 2=280 ft.-2.5% • Level section=50 ft. CNTSC-WinPond Workshop Exercise #1

  6. Exercise #1 WASHINGTON COUNTY CNTSC-WinPond Workshop Exercise #1

  7. Exercise #1 GSS #1 CNTSC-WinPond Workshop Exercise #1

  8. Exercise #1 WASHINGTON COUNTY CNTSC-WinPond Workshop Exercise #1

  9. Exercise #1 Washington County, TX CNTSC-WinPond Workshop Exercise #1

  10. Exercise #1 Washington County, TX CNTSC-WinPond Workshop Exercise #1

  11. Exercise #1 WASHINGTON COUNTY CNTSC-WinPond Workshop Exercise #1

  12. Exercise #1 • The landowner wants a pipe drop for his pond. Top width is 12.0 ft. Front and back slopes will be 4:1 No berms are needed Pool Bottom elevation is 85.5 Channel and Outlet elevation is 88.0 Tailwater elevation is 90.0 Outlet extension is 6.0 ft. C/L low point elevation is 89.5 Auxiliary Spillway Exit Slope is 4.5% CNTSC-WinPond Workshop Exercise #1

  13. Exercise #1 Sediment Estimates: Computations or use RUSLE2 Acres Rate RxAC 8 - 5 ton/ac/yr – 40 ton/yr 20 - 2.5 ton/ac/yr - 50 ton/yr 21 - 1 ton/ac/yr - 21 ton/yr 54 - 1 ton/ac/yr - 54 ton/yr Total 103 - - 165 ton/yr - 330,000 lbs/yr @2000 lbs/ton - 3511 ft3/yr @ 94 lbs/ft3 - 130 cy/yr @27 ft3/cy - 0.08 AF/yr @1613 cu/AF - 1.13 AF @ 25 yr @ 56 % 1/2 aerated - 0.565 AF 1/2-submerged - 0.565 AF CNTSC-WinPond Workshop Exercise #1

  14. Exercise #1 Washington County, TX CNTSC-WinPond Workshop Exercise #1

  15. Exercise #1 CNTSC-WinPond Workshop Exercise #1

  16. Exercise #1 Washington County,TX CNTSC-WinPond Workshop Exercise #1

  17. Exercise #1 • You will use three pipe trials, all HCMP-Helical Corrugated Metal Pipe • The inlet extension horizontal distance is 4.0 ft • Use an entrance coefficient of 1.0 • Choose a Manning's “n” value from chart and apply an aging factor of 10%. CNTSC-WinPond Workshop Exercise #1

  18. Exercise #1 CNTSC-WinPond Workshop Exercise #1

  19. Exercise #1 • The auxiliary spillway width is 30 ft. with a C retardance. • The level section is 50 Ft. with 4:1 side slope. • The exit channel will be a C retardance. • The permissible velocity is 5.0 FPS CNTSC-WinPond Workshop Exercise #1

  20. Exercise #1 Station----Upstream RR/Distance---CL---Downstream RR/Distance 0+00 6.6 0+43 8.3 0+73 9.6 1+03 11.8 1+33 13.0 1+63 14.2 1+93 15.7 2+23 16.2 2+53 19.0 2+87 23.1 3+37 18.6 3+67 17.4 3+87 16.8 4+17 15.7 4+57 9.3 4+87 5.6 H.I.=112.6 CNTSC-WinPond Workshop Exercise #1

  21. Exercise #1 • Fill in the blank. • The Auxiliary Spillway Crest is____________Ft. Elevation. • The Principal Spillway Crest is ____________Ft. Elevation • The estimated settled fill is _______________CY. • The barrel diameter is ___________________inches. • The riser diameter is ____________________inches. CNTSC-WinPond Workshop Exercise #1

  22. Exercise #1 CNTSC-WinPond Workshop Exercise #1

  23. Exercise #1 • COST ESTIMATE: • Embankment Fill__________CY x $1.10/CY=____________ • Sodding ____________2000 SY x $0.11/SY=__$220.00____ • Pipe Barrel______Dia(in)_____Ft.x $_____=_____________ • Concrete____________2.0 CY x $200.0/CY=__$400.0______ • Installation__________Ft. of Barrel x $8.00=_____________ • Total Cost=____________ CNTSC-WinPond Workshop Exercise #1

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