FLOOD08905

• County: Gilpin
• Community: Black Hawk
• Basin: South Platte
• Title: 1998 Black Hawk Flood
• Date: 9/8/1998
• Prepared For: Clear Creek County
• Prepared By: Consultants
• Floodplain - Doc Type: Flood Documentation Report

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Table 3 Storm Peak Discharge Calculations - Historic Basins

Basin tc A 15 C5 1100 ClOO Q5 QlOO
(min) (ae) (inIhr) (inIhr) (cfs) (cfs)
B1 20 69 2.4 0.47 4.3 0.65 77 189
B2 10 14 3.3 0.47 6.0 0.65 21 53
B3 11 25 3.1 0.47 5.8 0.65 37 94
B4 13 8 2.9 0.47 5.2 0.65 10 25
B5 11 4 3.1 0.47 5.8 0.65 6 16
B6 10 3 3.3 0.47 6.0 0.65 5 13
G1 10 5 3.3 0.47 6.0 0.65 8 21
G2 11 13 3.1 0.47 5.8 0.65 19 48
G3 13 61 2.9 0.47 5.2 0.65 83 206