§ 21-54. Design methods.

All storm drainage works and facilities to which this division applies shall be designed on the basis of accepted methods of engineering analysis.

(1)

Stormwater runoff. Stormwater runoff and discharge from a watershed or drainage area shall be computed on the basis of:

a.

Soil conservation service (SCS) methods;

b.

Louisiana Department of Transportation and Development (La. DOTD) methods; or

c.

An accepted method of engineering analysis which is based on the "rational method" and which takes into account such variable as infiltration, retention and transit losses.

(2)

Hydraulics. All components of a storm drainage system which are required to transfer stormwater runoff to a receiving stream, channel or discharge point, shall be designed on the basis of accepted methods of engineering analysis.

(Ord. No. 7944, 3-11-85)