§ 14-25. Rainfall and runoff criteria.

Latest version.

The drainage system or project shall be designed for design floods resulting from rainstorms of the following expected frequencies or greater:
(1)

25-year intervals for major drainageways.

(2)

Ten-year intervals for all other drainage. Rainfall intensity data shall be taken from references established by the county public works director.

(3)

Ultimate land usage shall be assumed for selection of proper runoff coefficients within the basins involved. Weighted runoff coefficients shall be applied where different coefficients apply within the areas comprising the basin.

(Code 1988, § 8-17; Ord. No. 83-1, § 3(2))

                    
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