A master stormwater management plan for the entire Westowne Shopping Center redevelopment area which governs the overall stormwater management of the Westowne Shopping Center has been prepared by and approved by the City of West Des Moines. An agreement exists in Book 14005, Page 819 in the Polk County Recorder’s office and amended on February 3, 2020 outlining the implementation schedule of this plan. Any alternate timelines for the implementation of storm water management measures from that previously established within the agreement will require the approval of the City Council.
A regional storm water management facility is being considered which will be located within this property. Details for the construction and maintenance of the facility will be detailed in a separate agreement or per modifications to the existing recorded agreement indicated above. In the event the facility is located within an existing parking area, minimum parking requirements for the site shall be appropriately reduce by the number of stalls affected by the facility. Additionally, as provided in the buffer provisions, any vegetation that is serving to buffer the west property that is removed to accommodate the detention facility shall be the responsibility of the city to replace.
Individual stormwater management plans which align with the master stormwater management plan will be required with the development of each site plan (new site plan, Major Modification and Minor Modifications that increase net impervious by more than 2,000sf). The individual stormwater management plans shall be prepared at the developer’s expense, by a professional engineer licensed in the state of Iowa. All individual stormwater management plans shall comply with the city’s applicable design standards for stormwater management existing at the time each development (site plan) is approved and demonstrate compliance with the Westowne Shopping Center East master stormwater management plan.
A Stormwater Management Facility Maintenance Agreement (SWMFMA) exists for this site. In conjunction with the installation of any new storm water management facilities within the site, the developer of the Westowne Shopping Center PUD shall be required to update the SWMFMA to guarantee future maintenance of any new stormwater facilities. (Ord. 2485, 8-2-2021)