A master stormwater management plan for the entire development which governs the overall stormwater management of the development shall be submitted to and approved by the city of West Des Moines. Specific stormwater management plans demonstrating compliance with the approved Mills Crossing master stormwater management plan, on file in the city will be required with the development of each site plan. The specific stormwater plans shall be prepared at the developer's expense, by a professional engineer licensed in the state of Iowa. All specific stormwater management plans shall comply with the city's applicable design standards for stormwater management existing at the time each site plan is approved. (Ord. 2060, 11-3-2014)