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Hillcrest Subdivision

Hillcrest Subdivision. Hillcrest Subdivision is located on loop 1604, 1 mile North of US 90. Introduction. Second Phase 932 feet of new storm drain 1,936 feet of new sanitary sewer approximately 3,000 feet of new water main 3,016 feet of new street New Streets Rustic Spoke

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Hillcrest Subdivision

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  1. Hillcrest Subdivision • Hillcrest Subdivision is located on loop 1604, 1 mile North of US 90.

  2. Introduction Second Phase 932 feet of new storm drain 1,936 feet of new sanitary sewer approximately 3,000 feet of new water main 3,016 feet of new street New Streets Rustic Spoke Burning Lamp BisleyPass.

  3. Water Line Details • The expected demand is 34200 gpd • Total of 114 home would be supplied • The Water line ties into an existing 8” water line • There is approximately 3016 linear feet of this 8” PVC • 5 fire hydrants spaced at a max distance of feet

  4. STORM Water Design • Throughout the project 3 types of drainage systems are recommended to be used. • Trapezoidal Channel • Rectangular Channel • Concrete Pipe • Designed for 25 year storm • Total Area = 23.4 acres • Q = 84.9 cfs • I = 5.5 in/hr • C = 0.67

  5. Trapezoidal Channel • Lies on the North edge of the subdivision • Runs from East to West • Channel Drains 10.49 Acres • Q = 38 cfs • Downstream section • Slope = 0.0127

  6. Trapezoidal Continued • Upstream Section • Slope = 0.0567

  7. Rectangular Channel • Upstream Cross Section • Slope = 0.0461 • Q = 81.8 cfs • FB = 6”

  8. Rectangular Continued • Downstream Cross Section • Q= 81.8 • Slope = 0.005 • Both sections designed with h= 2’- 1” • FB = 15”

  9. Underground Drainage Consists of gutters Junction Boxes (4x4 and 5x5) Reinforced Concrete Pipe (RCP) Designed to intercept 8.13 cfs Effeciency = 65.5% By pass flow = 4.27 cfs

  10. Sanitary Sewer Plan view Total flow = 34,260 gpd

  11. Sanitary Continued

  12. Cost Estimate

  13. ScheduleJune 3rd – September 13th

  14. Questions ?

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