DCPCUP-0000-01484 - Laserfiche WebLink

Home Browse Search

SECT=DNFOur Sammeru al CnnaPln ng Based on the analyses presented in this report,we conclude the following regarding potential hydrologic and water quality impacts of the proposed Phase 1 a:d Phase 2 sand and gravel extraction operation: 1. Creation of a series of ponds through"In-the- Vet"sand and gravel extraction will not produce a significant change in groundwater levels, in recharge to the groundwater system, or in the general direction of groundwater flow in the area of the proposed operation. Therefore, the proposed operation should not negatively impact the capacity of adjacent private water supply wells. 2. During site operations, the planned pollution prevention approach will control the risk of accidental release to the ponds,and to groundwater. After extraction operations have ceased, the proposed site use will continue to provide protection from accidental releases. As a result, the proposed operation is not expected to negatively impact groundwater quality in the area. Further, the presence of the ponds is not expected to negatively impact the temperature of groundwater discharge entering Badger Mill Creek or the Sugar River. 3. Operation of the site as a closed hydraulic system, with no surface water discharge to Badger Mill Creek, will prevent any direct surface water discharge or water quality problems to impact the Creek.The planned operations and operational controls on vehicles and materials leaving the facility will control tracking and incidental material losses which could present wash-off threat to local surface water. Beyond not producing a negative impact,the proposed extraction operation could provide a positive contribution to water resource management of the Badger Mill Creek!Sugar River watershed. These positive impacts could include.. 4. The ponds which will result from sand and gravel extraction will provide high sediment trap efficiency in treating surface water runoff entering from uplands areas. Drainage from adjacent lands could be routed into the site's ponds, to reduce suspended sediment loading to Badger Milt Creek. 5. The ponds could be used to provide additional recharge to the groundwater system,over that which is currently occurring,by routing runoff from adjacent areas into the ponds(as described above) and also by allowing Badger Mill Creek floodwaters to flow into the ponds, , and be retained in the ponds to infiltrate to the groundwater system. In this way,the pond system could partially compensate for increased runoff and loss of recharge due to urbanization upstream on Badger Mill Creek. 6. Allowing overflow of Badger Mill Creek floodstage waters into the ponds will also provide minor benefits in reducing flood discharge dowh-nstrearri. s�':eFaa�Or?-s.1r-1sti iv.ov 4-1