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Mounds View Stormwater Pond Assessment 4 RECOMMENDATIONS July 2023 A "No -Loss" means there is no permanent loss of or impact to wetlands. Following is a summary of some types of work that could potentially qualify for a No -Loss. • No impacts to a wetland are proposed. Proof that a basin is constructed or that the project will avoid impacts to a wetland would be required. • Excavation is limited to removal of sediment or debris such as culvert blockages, trash, trees, logs, stumps, or beaver dams. The removal must not result in alteration of the original cross- section of the wetland. Drainage improvements could include actions such as removing materials blocking installed culverts or other drainage structures or removal of beaver dams. • Excavation is limited to removal of sediment deposited in wetlands that are presently utilized as stormwater management basins or excavation and removal of contaminated substrates. The excavation must be limited to the minimum dimensions necessary for achieving the desired purpose and stabilized to prevent water quality degradation. • Operation, routine maintenance, or emergency repair of existing utilities and public works structures, including pipelines. The activity must not result in additional wetland intrusion or impacts. • Temporary impacts rectified by repairing, rehabilitating, or restoring the affected wetland to pre - project function and conditions. Exemption Criteria An impact would be exempt from replacement of the wetland impacts if it qualifies for an exemption listed in WCA. No exemptions apply to wetland mitigation sites or partially impacted wetlands. Exemptions may not be combined. Following is a summary of some types of work that could potentially qualify for an exemption. Impacts resulting from installation, maintenance, repair, or replacement of utility lines, including pipelines. The impacts must be avoided and minimized to the fullest extent possible, and the project must modify or alter less than one-half acre of wetland. Emergency repairs may proceed as necessary, and any impacts addressed after the emergency work is completed. De minimis impacts are less than the amount listed in MN Statutes 8420.0420. Property may not be divided to increase the amount of de minimis allowed for a single project. 4.5 ADDITIONAL RECOMMENDATIONS Four basins (AA-4. P1, SC-4.134, SC-4.135, SL-1.131) were found to have been removed. We advise the City to investigate further into the circumstances under which the basins were removed. Five basins appear to receive no direct stormwater runoff. No inlet or outlet pipes were observed during field inspection. Historical record information provided by the City indicates GF-1.P1, GF-1.P2, GF-2.P1, and GF-2.P2 are potentially wetlands. GF-2.P3 also has no identified inlet our outlet pipes and appears to receive no direct stormwater runoff. From historical information provided by the City, it was potentially an 27