Copper Creek Master Plan Master Plan Brent McCrea Scott Christensen - - PowerPoint PPT Presentation

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Copper Creek Master Plan Master Plan Brent McCrea Scott Christensen - - PowerPoint PPT Presentation

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Copper Creek Master Plan Master Plan Brent McCrea Scott Christensen Amy Holt Amy Holt Jared Erickson Robert Ryzska CE 472 Senior Design April 2012 Overview WMS Hydrologic Analysis HMS model was used to Volume Condition CN Q p (cfs)

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SLIDE 1

Copper Creek Master Plan Master Plan

Brent McCrea Scott Christensen Amy Holt Amy Holt Jared Erickson Robert Ryzska

CE 472 – Senior Design April 2012

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SLIDE 2

Overview

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SLIDE 3

WMS – Hydrologic Analysis

  • HMS model was used to

predict 100 year storm event

Condition CN Qp (cfs) Volume (ft3)

p y runoff

  • WMS used to set up HMS

model

  • SCS Curve Number used as

Pre-Development 67.7 134 2883510 Post-Development 73.9 213.6 4141620

loss method

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SLIDE 4

WMS – Hydrologic Analysis Cont. Cont.

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SLIDE 5

Channel Design

Inner channel to hold 2‐yr flow; lined with flow; lined with cobbles. Outer channel to hold 100‐yr flow; lined with grass.

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SLIDE 6

HEC‐RAS

Hydraulic Analysis of Natural Channel

Top Left: Natural Channel in WMS Right: After X‐Sec extraction from WMS Bottom Left: HEC‐RAS model of natural channel flow

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SLIDE 7

HEC‐RAS

Hydraulic Analysis of Designed Channel Entire channel after design

Larger X‐Sec due to contraction of channel

Entire channel after design

X‐Sec of main channel

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SLIDE 8

Detention Basin

420 ft 40 ft

20 25 ft)

Detention Basin Storage

34

5 10 15 Storage (ac‐f 250

Detention Basin Outlet

1000 2000 3000 4000 Time (min) 150 200 250 (cfs)

Routed Hydrograph Pre‐Development Flow

Geometry Length Width Height(req) Height (design) Side Slope 420 340 6.12 7.25 2

50 100 Q

Post‐Develoment Flow

Outlet Pipe Diameter (ft) 3.75 Height above Base Elev (ft) Manning's n 0.015

500 1000 1500 2000 2500 3000 3500 Time (min)

Slope (ft/ft) 0.012727 Orifice Coefficient 0.6 Base Elevation (ft) 4935

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SLIDE 9

Conclusion

Cost Analysis

  • Detention Basin

Recommendations

  • Volume of 991208 ft3
  • Estimated cost of $288,000
  • Cost includes
  • Excavation
  • Open Channel
  • Inner Channel to hold 2‐yr

flow

  • Outer Channel to hold
  • Excavation
  • Grading
  • All finishing costs
  • Open Channel
  • Outer Channel to hold

100‐yr flow

  • Detention Basin for post‐

development runoff

  • Volume of 138,600 ft3
  • Estimated cost of $142,000
  • Cost Includes
  • Excavation
  • Excavation
  • Site Prep and

Survey

  • Piped Flow

Piped Flow

  • Estimated Cost of

$480,000

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SLIDE 10

Questions?