A. Plan Required: Improvement plans providing for the drainage of stormwater shall include a drainage plan relating to the draining of the proposed subdivision to the drainage area of which it is a part; a calculation of the runoff based on the state of Idaho transportation department urban storm sewer design in a five (5) year period for the watercourses lying within or running through the subdivision as set forth in the standard specifications of the city; and a demonstration of the method for disposing of runoff from the subdivision, including the size, location and dedication of drainage easements.
B. Construction Standards: Drainage structures, channel improvements and storm sewers shall be constructed in accordance with the standard specifications of the city. These structures, improvements and sewer shall be so constructed to dispose of the calculated maximum runoff to a point of final discharge or acceptable wasteway.
C. Drainage Ditches: All drainage ditches and wasteways, new or existing, shall be piped. (Ord. 8-96, 11-11-1996)