PERMFILE103421 - Laserfiche WebLink

Home Browse Search

Page l5 14. "What sediment loading will result from the ponds? Along these lines, what are the short and long term operation/maintenance treatment costs associated with these ponds beams?" (C/enn Water Action, Env. lnfo. Sen~ices, Trout UnlimiterQ Response -The only sediment loading of area streams from the sediment control ponds would be from a storm event in excess of the 100-year, 24-hour event, plus an additional 0.5 inches of precipitation during such an event. The applicant will be required, by the proposed permit, to construct permanent sediment ponds to handle the 100-year event. 15. "How will the applicant replace water lost due to potential evaporation from the ground water exposed by the mine pit?" (Glenn Water Action, Env. /nfo. Services, Trout Unlimited) Response -The applicant does not plan to expose groundwater; therefore, there should be no groundwater lost to evaporation. 16. "How does the applicant propose to ensure that process waters released into the pits meet all applicable water quality standards, including those designed to protect surface flows that are likely hydrologically connected to the ground water impacted by the pits?" (Glenn Water Action, Env. Lrfo. Services, Trout Unlimited) Response - There is no water quality standard for the water the applicant proposes to release into the gravel pit. The Division believes the process water (dust suppression water) will be adequately filtered of suspended solids before it reaches any surface flow. The water will percolate through a large volume of sand and gravel before it reaches ground water . The ground water will then move through additional large volumes of sand and gravel before it has a chance to reach surface flows. The water should be as free of suspended solids as the rest of [he natural ground water. 17. "What is the projected quality of the process water?" (Glenn WalerAction, Env. /nfo. Services, Trout Unlimited) Response -The applicant will obtain his water for dust suppression from the Arkansas River. The water will have the same quality as the river waters until it is used for dust suppression. After use for dust suppression, the water will be quite high in suspended solids, which will be filtered out as it flows through sands and gravels before the water reaches off-site locations. Exhibit H -Wildlife Information 1. "What will be the impacts to local aquatic life?" (Clean WnterAction, Env. /nfo. Services, Trout Unlimited)