FLOOD09526

• Designation Number: 281
• County: Boulder
• Community: Boulder
• Stream Name: Boulder and Adjacent Boulder County Drainageways
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Boulder and Adjacent County Drainageways
• Date: 5/1/1987
• Designation Date: 10/1/1987
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE 5
CUHPB Basin Parameters
Decay Final
* Sub-Basin AREA Basin Lea Pervious I~ervious Initial Rate Infl.
Designation Length Depression Depression Infl. (per Rate
( mi 2 L-1!ill C!ill %1 Ct* Cp _(Inches) (Inches ) (In/Hr ) sec.) (In/Hr)
King's Gulch
K1 0.23 1.00 0.44 5.0 0.26 0.24 0.50 0.10 3.0 0.0018 0.5
K2 0.09 0.57 0.38 35.0 0.32 0.15 0.40 0.10 3.0 O.OOlB 0.5
Bluebell Canyon
Creek
B1 0.40 1.55 0.95 5.0 0.30 0.26 0.50 0.10 3.0 0.0018 0.5
B2 0.28 0.88 0.35 46.0 0.14 0.47 0.40 0.10 3.0 0.0018 0.5
Gregory Creek
61 1.16 1.61 0.87 5.0 0.34 0.30 0.50 0.10 3.0 0.0018 0.5
62 0.40 0.93 0.45 5.0 0.29 0.24 0.50 0.10 3.0 0.0018 0.5
63 0.73 1.20 0.72 33.0 0.42 0.19 0.40 0.10 3.0 0.0018 0.5
Sunshine Canyon
Creek
Sl 1.13 2.56 0.95 .5 0.33 0.33 0.50 0.10 3.0 0.0018 0.5
S2 0.30 0.91 0.46 5.0 0.27 0.24 0.50 0.10 3.0 0.0018 0.5
S3 0.29 0.91 0.40 5.0 0.27 0.28 0.50 0.10 3.0 0.0018 0.5
S4 0.10 0.47 0.40 43.0 0.39 0.13 0.40 0.10 3.0 0.0018 0.5
Bear Canyon
Creek
401 2.84 4.43 2.05 7.0 0.40 0.34 0.50 0.10 3.0 0.0018 0.5
402 0.87 1.59 0.76 27.0 0.22 0.37 0.50 0.10 4.0" 0.0018 0.6
403 0.37 1.10 0.68 53.0 0.20 0.54 0.40 0.10 4..0 0.0018 0.6
404 0.26 0.83 0.57 42.0 0.24 0.43 0.40 0.10 4.0 0.0018 0.6
405 0.37 1.04 0.38 28.0 0.18 0.33 . 0.40 0.10 4.0 0.0018 0.6
406 0.18 0.64 0.27 40.0 0.19 0.40 0.40 0.10 4.0 0.0018 0.6
407 0.07 0.47 0.25 20.0 0.21 0.22 0.50 0.10 3.0 0.0018 0.5
408 0.39 1. 74 0.95 32.0 0.31 0.32 0.40 0.10 3.0 0.0018 0.5
409 0.06 0.38 0.27 5.0 0.31 0.19 0.50 0.10 3.0 0.0018 0.5
Elmer's Twomfle
501 0.12 0.52 0.25 30.0 0.16 0.30 0.40 0.10 3.0 0.0018 0.5
502 0.19 0.72 0.22 36.0 0.18 0.37 0.40 0.10 3.0 0.0018 0.5
503 0.21 1.06 0.64 47.0 0.23 0.44 0.40 0.10 3.0 0.0018 0.5
* Oesi9n Points for each sub-basin designation are shown
on Figures 1 and 2, respectively.

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