(A) It is recognized that streams and drainage channels serving the Town of Monrovia may not have sufficient capacity to receive and convey storm water runoff resulting when land use changed from underdeveloped or agricultural use to a more urbanized use. It is further recognized that deposits of sediment from developments during and after construction can reduce capacities of storm sewers and drainage systems and result in damages to receiving lakes and streams.
(B) Therefore, it shall be the policy of the Town of Monrovia Plan Commission that the storage and controlled release of storm water runoff shall be required of all new development except as exempted in § 152.003, and redevelopment, certain other new construction in the Town of Monrovia. The storm water release rate of a 100-year storm event from development, redevelopment, and certain new construction shall not exceed the storm water runoff from a 10-year storm event from the land area prior to the new development, redevelopment, or certain new construction or the capacity of its drainage outlet, whichever is more restrictive. There are certain circumstances where detention is not justified or may be detrimental to the overall drainage basin. The Plan Commission may waive detention requirements in these cases. Open ditches with side slopes steeper than 3:1 are not allowed. No open ditch shall be greater than 3 feet deep.
(Ord. passed 10-11-2004)