10-15-1984 Council Packet - Laserfiche WebLink

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Review Criteria: 1. Disposal of soils: Soils excavated from wetland could not be used to grade and fill banl:s of pond but had to be placed a minimum of 50 feet away froom pond/wetland basin and hay bales stal ed around thc- spoils area. 2. -Time of year alteration is performed: Suction dredging remains the best method but not always feasible. Early winter is thF best time to dredge wetlands. In this application given the type of Soils atel a up, earl y winter may be a must. 3. Location of dredged area within wetlands: Vegetation must not be disturbed between pond and outlet from wetland. Vegetation must remain to catch or filter sediment and slow down rate of flow. 4. Replacement Factor: If the reviewing staff con+ir-nrs reduction in assimilative rapacity of wetland created by alteration then a matching area must be set aside to replace assimilative capacity. The extension of the protected wetland area south to the culvert providing additional grassy, permeable surface will provide replacement but ade- quacy of that replacement should be confirmed by hydraulic information. At the September 17, 1984 Planning Commission meeting, applicant revised his plan to include a the or culvert which would cause overflow of the wetland to flow westwardly to lot _ and then flow overland naturally through a pond and swale system on that lot. The invert of the culvert would be placed to c.11ow overflow at approximately the 1032 elevation. Planning Commission in a majority vote recommended approval of the variance and conditional use permit for dredging of the pond, with a drainage tile or culvert to the pond to the west (Application #846), based on the following findings: 1. The e>;cavation for the pond will have no detrimental effect on the surrounding property. 2. The improvement will enhance the aesthetic value of the property. '. This excavation will not impede the natural drainage of the area.