(A) The objective of a regional stormwater management facility, pond or other device, is to address the stormwater management concerns in a given watershed with greater economy and efficiency than possible through individual facilities. The intended result is fewer stormwater management facilities to maintain in the affected watershed while sustaining efficiency.
(B) The city encourages regional stormwater quantity and/or quality management practices, serving 25 to 250 acres of tributary area, which may be consistently and efficiently managed and maintained. These types of practices will be encouraged in order to replace or reduce the implementation of on-site stormwater quantity and/or quality management practices, as determined to be appropriate by the city.
(C) Where a regional stormwater management facility has been established by one or more local governments, or by an authority operating on behalf of one or more local governments, a development or property may participate in said program in lieu of runoff control required by this subchapter. This may be permitted; provided that:
(1) Runoff from the development drains to an approved existing or proposed public regional stormwater management facility that will be operational within one year;
(2) Participation in the form of contribution of funds, contribution of land, contribution of stormwater management facility construction work, or a combination of these, the total value of which shall be in accordance with a fee schedule adopted by the city;
(3) The city finds that the stormwater quality management plans are in compliance with all other applicable requirements and articles; and
(4) Each fiscal or in-kind contribution from a development owner participating in a regional stormwater quality management facility shall be used for acquisition, design, construction or maintenance of one or more such facilities in the same watershed in which the development is located.
(D) Detention facilities may, and are encouraged to, be designed to serve multiple purposes. For example, runoff may be detained under wet-weather conditions, but also serve as common or recreational areas during dry-weather conditions. Where multi-purpose facilities are provided, or where flat grades or poorly draining soils are encountered, provisions for adequate low-flow storm water management system may be required. Where the retention/detention facility is planned to be used as a lake, pond or stormwater quality management practice with a permanent pool, water budget calculations shall be performed and submitted to demonstrate that an adequate pool is expected during dry summer months.
(Ord. G-06-12, passed 4-20-2006)