Ordinances-2012-313

3. Provides overbank flood protection in accordance with the City storm water standards, 4. Provides an emergency overflow spillway (including one-foot freeboard) and designated overflow route for extreme rainfall events. The spillway must be designed for the 100-year event and assuming the initial outlet controls are completely blocked. 5. Provides storm water BMP facilities which are constructed and function in accordance with the approved design. The property owner or applicant must provide to the City an as-built plan detailing dimensions and elevations as well as certification that the approved facilities were installed and properly working. The as-built plan must be completed by an Iowa-licensed professional engineer and submitted to the City prior to the acceptance of any improvements or issuance of any certificates of occupancy. 6. Provides for all BMPs selected to be utilized in each development to be designed, constructed, and maintained as required by the City storm water standards. Section 11: Maintenance and Repair of Storm Water BMPs. 1. The landowner or developer of every site subject to the provisions of this chapter will be responsible for maintaining as-built storm water BMPs in an effective state as determined in the sole judgment of the City for 25 years after completion of construction. 2. Prior to the issuance of any permit for development involving any storm water BMP, the landowner or developer must execute a storm water management easement for each BMP in a form acceptable to the City. The easement will provide for access to the BMP by the City for periodic inspection. The easement must be recorded at the expense of the landowner or developer. 3. Prior to the issuance of any development permit, the landowner or developer must execute a storm water BMP maintenance agreement in a form acceptable to the City that requires the landowner or developer to inspect and maintain each storm water BMP for a period of 25 years. The Maintenance and Repair Agreement must include but is not limited to the following: A. Sediment Forebay: 1. Install depth marker and monitor sediment build-up. Monitor and remove sediment after accumulation of 33% of original depth. 2. Remove trash and debris as needed. 3. Inspect filter strip and re-seed or sod on a semi-annual basis. 4. Based on inspection, plant an alternative grass species if the original grass cover has not been successfully established. B. Pond: 1. Prune and weed wildflower plantings as need. Inspect vegetation on a semi-annual basis. Corrective measures may include replanting any bare patches where vegetation has been unsuccessful or removed. 2. Inspect for damage to the embankment, repair undercut or