C150259 Feasibility Study

• Contract/PO #: C150259
• Contractor Name: Bijou Irrigation District
• Contract Type: Loan
• Water District: 1
• County: Morgan
• County: Weld
• Loan Projects - Doc Type: Feasibility Study

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Step b) Fastest Mile and One-Hour Winds Over Water

Wind data obtained from Colorado Assistant State Climatologist

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Over Land to Over Water Wind Com utations

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Wind Duration

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66
48
46 (0.96 x 48)

,

77
56
54

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1
60
120

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Wind Relationship - Water to Land
Enter Effective Fetch Value to Interpolate in Appropriate Box
Eff. Fetch, Fe, mi 0.5 1 0.70 ~ 1 I 1.45 ~ 2 ~2.501 3 13.501 4 14.67 ~ 5
Wind Vel. Ratio, 1.08 1.10 1.13 1.17 1.21 1.24 1.26 1.27 1.28 1.29 1.3
I (Water)/(Land)

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Water to Land Ratio =

1.17

I(interpolated value from table above)

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Step c) Wind Velocity over Water versus Wind Duration

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Values from Figure 9, using effective fetch and wind velocity over water

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Wind Velocitv and Duration Data Points
Wind Velocity Over Water (mi/hr) Wind Duration (min)
10
20
30
40 25.0
50 23.0
60 21.0
70 19.0
80 18.5

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Page 2 of4

Filename: Freeboard Wave Runup.xls
11/29/2007