A. Site Design Feasibility: Stormwater management practices for a site shall be chosen based on the physical conditions of the site. Among the factors that should be considered are:
1. Topography;
2. Drainage area;
3. Depth to water table;
4. Soil types;
5. Slope of the site;
6. Location of the site in relation to environmentally sensitive areas.
B. Conveyance Issues: All stormwater best management practices shall be designed to convey stormwater to allow for the maximum removal of pollutants and reduction in flow velocities. This shall include, but not be limited to:
1. Maximizing of flow paths from inflow points to outflow points;
2. Protection of inlet and outfall structures;
3. Elimination of erosive flow velocities;
4. Providing underdrain systems, where applicable.
C. Landscaping Plans Required: All stormwater best management practices must have a landscaping plan detailing both the vegetation to be in the practice and how and who will manage and maintain this vegetation. This plan must be prepared by a registered landscape architect or soil conservation district.
D. Low Impact Development (LID) Requirements: For new development or redevelopment projects that disturb greater than or equal to one acre, including projects less than one acre that are part of a larger common plan of development or sale, the evaluation of an LID approach is required to implement BMPs that infiltrate, evapotranspire, or harvest and use stormwater from the site to protect water quality (see section 10-20-3 of this code).
E. Maintenance Agreements: All stormwater treatment practices shall have an enforceable operation and maintenance agreement to ensure the system functions as designed.
1. This agreement will include any and all maintenance easements required to access and inspect the stormwater treatment practices, and to perform routine maintenance as necessary to ensure proper functioning of the stormwater treatment practice. The agreement shall include provisions allowing for access and inspections on a reasonable basis. In addition, a legally binding covenant specifying the parties responsible for the proper maintenance of all stormwater treatment practices shall be secured prior to issuance of any permits for land disturbance activities.
2. If a responsible party fails or refuses to meet the requirements of the maintenance covenant, the public works department, after reasonable notice, may correct a violation of the design standards or maintenance needs by performing all necessary work to place the facility in proper working condition. In the event that the stormwater management facility becomes a danger to public safety or public health, the public works department shall notify the party responsible for maintenance of the stormwater management facility in writing. Upon receipt of that notice, the responsible person shall have seven (7) days to effect maintenance and repair of the facility in an approved manner. After proper notice, the public works department may assess the owner of the facility for the cost of repair work and any penalties; and the cost of the work may be placed on the utility bill and collected as ordinary utility fees by the city. Failure to pay any portion of the fee may result in termination of water service, power service, or both. (Ord. 2016-12, 8-16-2016)