Agenda - Environmental Policy Board - 08/04/2014

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Sec 117.384 -410 Revised July 29, 2014 to include 2013 Construction Stormwater Permit, 2013 MS4 Permit requirements and 2012 LRRWMO Third Generation Plan [dam, additions] Sec. 117 -398. Appropriations from stormwater ponds. Appropriation of water from stormwater ponds for the purpose of private irrigation may be allowed based upon criteria established by the City. City approval must be granted before use begins. Sec. 117.399. Rain gardens in road right of way. In order to obtain a Right of Way permit, rain gardens constructed in the right of way will be required to capture street runoff. The property owner must agree to this condition and accept responsibility for maintenance of the rain garden and associated features. (a) If the homeowner is not agreeable to allowing street runoff into the rain garden they must agree to install features that would direct all driveway runoff to the rain garden and capture 75% of front yard and roof runoff. Maintenance of the rain garden and associated features will be the responsibility of the homeowner. (b) Rain gardens proposed for construction in the right of way must have plans approved by the City Engineering Department. These plans will include illustration of area draining to the rain garden; design details to prove proper sizing /capacity to handle the area of drainage; illustrate property boundaries, location of street features, driveway, house and other structures in relation to the rain garden; and include proof of infiltration potential and ability to drawdown with in a 48 hour period. (c) Rain gardens capturing street runoff would require a curb cut to direct flow into the rain garden. Curb cuts for rain gardens approved in the right of way will be constructed and paid for by the City. All other construction and maintenance associated with the rain garden is the sole responsibility of the homeowner. (d) City staff or designee has right of entry to all rain gardens in the right of way to ensure proper function of the feature. (e) Rain gardens in the right of way will be mapped as part of the City stormwater management system. These features will be counted toward meeting compliance of the City's MS4 permit with the State of Minnesota or other regulatory requirements imposed on the City through state, federal or other government agencies. (f) The City of Ramsey shall have no liability for the rain garden or its associated features. Sec. 117496400. — Mitigation Provisions. If the proposed stormwater treatment system does not provide the required reduction of TSS and or TP in discharges leaving the site then the developer shall provide off -site mitigation to achieve the required reduction. Mitigation project areas are selected in the following order of preference: 1) Locations that yield benefits to the same receiving water that receives runoff from the original construction activity. 2) Locations within the same Minnesota Department of Natural Resource (DNR) catchment area as the original construction activity. 3) Locations in the next adjacent DNR catchment area up- stream 4) Locations anywhere within the permittee's jurisdiction. Ramsey, Minnesota, Code of Ordinances Page 14