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CITY OF ST. ANTHONY VILLAGE WATER RESOURCES MANAGEMENT PLAN SECTION 5 Page 2 d. Basin side slopes above the normal water level should be no steeper than four to one, and preferably flatter. A basin shelf with a minimum width of ten feet and one foot deep below the normal water level is recommended to enhance wildlife habitat, reduce potential safety hazards, and improve access for long-term maintenance. e. To prevent short-circuiting, the distance between major inlets and the normal outlet shall be maximized. f. Retardance of peak discharges for the more frequent storms can be achieved through a principal spillway design which may include a perforated vertical riser, small orifice retention outlet, or compound weir. 3. Outfall structures discharging to wetlands or Public Waters/Wetlands need to incorporate energy dissipation at the outfall to minimize erosion. 4. The City of St. Anthony Village will sweep the streets at least five times annually. Furthermore, future purchases of street sweeping units will give consideration to street sweepers which have the greatest ability to remove nutrients from the streets. 5. The City of St. Anthony Village will require the inclusion of skimmers in the construction of new pond outlets, and add skimmers to the existing system whenever feasible and practical to prevent floatables from being discharged downstream. Skimmer structures will have a minimum four-inch overlap and the maximum 1-year storm event discharge velocity should not exceed 0.5 feet per second, and should provide skimming to the 1- year event water elevation. 6. The City will include provisions for coarse sedimentation and skimming floatable materials prior to stormwater discharge to lakes and DNR-protected wetlands as well as to the public drainage system managed by the RCWD. This requirement will apply in all cases except where it is deemed not feasible or not practical to do so. Considerations for variance to this policy will only be made in cases where the direct drainage area is limited in size and the probability that a significant pollutant discharge from the area to areas outside the City would be extremely unlikely. 7. The City will encourage programs aimed at fostering responsible water quality management practices by its residents. 8. The City will encourage homeowners with properties adjacent to water resources to establish a vegetative buffer strip at the shoreline. This strip should consist of legumes or other perennial grasses to limit erosion and nutrient transport across the buffer strip. 9. The City will inspect stormwater treatment basins at least every five years and sump catch basins/manholes every year. Maintenance will be conducted as necessary. 10. The City may develop and implement a water quality monitoring program capable of establishing that the stormwater treatment basins constructed within the City are not only designed to NURP standards, but also meet the anticipated design removal efficiencies based on actual monitoring of the system. This program will be carried out to the extent deemed necessary and reasonable by the St. Anthony Village City Council. The City will keep the RCWD and MWMO informed of all water quality monitoring program updates. 11. No fringe encroachment within shoreline areas associated with public water shall be permitted if the encroachment would have an adverse impact on natural vegetation buffer areas which provide water quality and habitat benefits. 5.3. Runoff Management and Flood Control 5.3.1. Goal Preserve, maintain, and expand (where possible) the stormwater storage, conveyance, and detention systems to control excessive runoff volumes and rates, prevent flooding, protect public health and safety, and minimize public capital expenditures. 5.3.2. Policies