FLOOD08228

• County: Boulder
• Community: Boulder
• Stream Name: Boulder Creek
• Basin: South Platte
• Title: Urban Drainage and Flood Control District
• Date: 3/1/1990
• Prepared For: Boulder Creek
• Prepared By: Goerge V. Sabol
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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Rainfall Losses

Hydrologic Design Manual
for Maricopa County

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B, When solls data are not available:
1. Estimate the CN based on data for similar watersheds or regional ex-
perience.
2 . Estimate the percent vegetation cover.
3. Use Figure4.11 to estimateCNSTL based on CN and hydrologic condition.
4. Use Table 4.3 to estimate IL based on the value of CNSTL.
5. Use Table 4.1 to estimate the surface retention loss CIA).
6. STRTL = IA + IL

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