CHAPTER 64 - SITE DESIGN POLICIES
64.310 STORMWATER RUNOFF:
Increases in runoff from the 10 year and 100 year frequency storms due to development shall be detained within the development and released at a rate no greater than existed prior to the development unless otherwise permitted by the City Engineer. Storm sewers normally shall be designed for a 10 year frequency storm, however; sewers designed to a greater frequency storm may be required where safer overland flow routes to requiring waters or major drainage facilities or collector systems are provided in a manner consistent with the Stormwater Management Plan. Greater runoffs may be permitted by the City Engineer if downstream stormwater management facilities are adequate for the conveyance or if the development is adjacent to a receiving body of water such as a lake or river and proposed runoff is consistent with the Stormwater Management Plan.
64.311
Overland Drainage Encouraged: The use of overland drainage and retention as an integral part of the control of stormwater runoff is encouraged where it is consistent with the Stormwater Management Plan, benefits groundwater recharge and reduces long-term maintenance costs.
64.312
Channel Restrictions Prohibited: No fences or structures shall be constructed across an open drainage channel that will reduce or restrict the flow of water, unless part of an approved retention or detention facility.
- All stormwater management facilities shall be designed and constructed in conformance with the City's stormwater management plan and other public works design criteria.
- The City may require any water course or stormwater management facility to be located within a dedicated drainage easement that provides sufficient width for maintenance.
next page

