1. Lands contained within Dauphin County that have not had release rates established under an approved Act 167 Stormwater Management Plan: (This includes portions of Dauphin Borough within the Susquehanna River Watershed, but located outside of the Stony Creek Watershed.).
A. Post-development discharge rates shall not exceed the pre-development discharge rates for the 1-year, 2-year, 10-year, 25-year, 50-year, and 100-year storms.
2. Lands contained within Dauphin County that have had release rates established under an approved Act 167 Stormwater Management Plan: (This includes portions of Dauphin Borough located within the Stony Creek Watershed.)
A. Post-development discharge rates shall not exceed the pre-development discharge rates for the 1-year, 50-year, and 100-year storms.
B. For the 2-year, 10-year, and 25-year storms, the post-development peak discharge rates shall be in accordance with the approved release rate map for the individual watershed. (For Stony Creek Watershed; 2-year: 30 percent release rate, 10- and 25-year: 100 percent release rate.)
(Note: The release rates indicated, represent a percent such that the post- development peak flow must not exceed the release rate (as a decimal value) times the pre-development peak flow, with flows calculated at the mouth of a subarea.)
(Ord. 11-01, 2/8/2011, §304)