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Table 3-1 Runoff Coefficients for Rational Formula Type of ...

Referenced from MDOT Drainage Manual, Storm Water Management CF 1 2015 Shiawassee County Table 3-1 Runoff Coefficients for Rational Formula Type of Drainage Area Runoff Coefficient, C* Concrete or Asphalt Pavement Commercial and Industrial Gravel Roadways and Shoulders Residential Urban Residential Suburban Undeveloped Berms Agricultural Cultivated Fields Agricultural Pastures Agricultural Forested Areas For flat slopes or permeable soil, lower values shall be used. For steep slopes or impermeable soil, higher values shall be used.

Table 3-1 Runoff Coefficients for Rational Formula Type of Drainage Area Runoff Coefficient, C* Concrete or Asphalt Pavement 0.8 – 0.9 Commercial and Industrial 0.7 – 0.9 Gravel Roadways and Shoulders 0.5 – 0.7 Residential – Urban 0.5 – 0.7 Residential – Suburban 0.3 – 0.5 Undeveloped 0.1 – 0.3 Berms 0.1 – 0.3

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Transcription of Table 3-1 Runoff Coefficients for Rational Formula Type of ...

1 Referenced from MDOT Drainage Manual, Storm Water Management CF 1 2015 Shiawassee County Table 3-1 Runoff Coefficients for Rational Formula Type of Drainage Area Runoff Coefficient, C* Concrete or Asphalt Pavement Commercial and Industrial Gravel Roadways and Shoulders Residential Urban Residential Suburban Undeveloped Berms Agricultural Cultivated Fields Agricultural Pastures Agricultural Forested Areas For flat slopes or permeable soil, lower values shall be used. For steep slopes or impermeable soil, higher values shall be used.

2 Steep slopes are 2:1 or steeper. From Michigan State Administrative Rules R

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