(A) Wetlands. The Wetland Conservation Act, as administered by the city's designated wetland authority, must be followed when encountering any wetlands.
(B) Storage piles. Any soil or dirt storage piles containing more than ten cubic yards of material should not be located with a down-slope drainage length of less than 25 feet from the toe of the storage pile to a roadway or drainage channel. If remaining for more than seven days, it must be stabilized by mulching, vegetative cover, tarps or other means. Soil deposit piles that will be in existence for less than seven days must be controlled by placing straw bales or silt barriers around the storage pile. In-street utility repair or construction soil or dirt storage piles located closer than 25 feet of a roadway or drainage channel must be covered with tarps or suitable alternative control, if exposed for more than seven days the storm drain inlets must be protected with straw bales or other appropriate filtering barriers.
(C) Permanent stabilization. A uniform perennial vegetative cover (e.g., evenly distributed, without large bare areas) with a density of 70% of the native background vegetative cover for the area must be established on all unpaved areas and areas not covered by permanent structures, or equivalent permanent stabilization measures.
(D) Site dewatering.
(1) Water may not be discharged in a manner that causes erosion or flooding of the site or receiving channels of a wetland.
(2) Dewatering may require a Minnesota Department of Natural Resources (DNR) water appropriation permit. If dewatering water is contaminated, discharge of such water may require an individual MPCA NPDES/SES permit.
(E) Waste and material disposal. All waste and unused building materials, including garbage, debris, cleaning wastes, wastewater, toxic materials or hazardous materials, shall be properly disposed of off-site and not allowed to be carried by runoff into a receiving channel or storm sewer system.
(F) Tracking. Graveled roads, access drives and parking areas must be of sufficient width and length to prevent sediment from being tracked onto public or private roadways. Any sediment reaching a public or private road shall be removed by street cleaning, not flushing, before the end of each workday.
(G) Drains.
(1) All storm drain inlets must be protected during construction with a barrier approved by the city until control measures are in place which meets accepted design criteria, standards and specifications.
(2) All drain leaders must be routed to storm sewer facilities or pervious areas wherein the runoff can be allowed to infiltrate.
(3) The flow rate of water from the leaders must be controlled so no erosion occurs in the previous areas.
(Ord. 20220120-01, passed 1-20-22)