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DRAINAGE -Mining is conducted in a manner that will not increase the amount of surface storm water runoff <br />above historic flows. Any storm water runoff entering the site will be captured using a system of diversion berms <br />and earthen ditches and directed to the excavated pond area. Changes in the historicdrainage pattemswill not <br />occur as a result of the extraction process. <br />PETROLEUM STORAGE- There is not permanent storage of fuel on the sde. However, an asphalt oil tank and <br />a diesel fuel tank will be located adjacent to the asphalt plant when it is present. Also, a diesel fuel tank will be <br />located near the portable gravel-crushing unR when it is in the staging area. All fuel is stored in above ground <br />tanks and will have lined containment dikes to prevent any discharges of fuel from leaving the sde or percolating <br />into the ground. Dikes are constructed in a fashion to contain at least 110 percent of the volume of the largest <br />fuel storage vessel within the containment area <br />LIFE OF MINING AREA -Several factors affect the total life of most sand and gravel operations. Most notable <br />is the surrounding community's future gravel, asphalt and concrete needs. Other factors include: <br />^ Local, State, and Federal Economic Trends <br />^ Future Local Growth Trends <br />^ Major Public and Private Improvement Projects - <br />Rail and Airport <br />Major School <br />Major Governmental Buildings <br />^ Major Commercial Buildings <br />The life of the mining activfies within the expansion area will be a "one time" occurrence. It is anticipated that <br />the total life of this aspect of the operation will range between 9 and 12 months, including reclamation efforts. <br />The existing mining area at the Thomas Gravel Pit is unique due to the continual renewal of sand and gravel <br />resources during periods of peak run-off in the Animus River. As long as major modifications do nottake place <br />up-stream of the site, mining of the sand and gravel resource vdll occur indefinitely. <br />Future plans for the Thomas Gravel Pit include continued discussions between the operator, the US Army <br />Corps of Engineers and the Division of Minerals and Geology in reference to the existing flood control dike <br />between the mining area and the main river channel. The future plan involves the removal ofthe dike and filling <br />of the dredged hole. This effort would further restore the river channel to a natural configuration and at the <br />same time improve the river hydrology and visual aspects. The work will re-establish a wide stable channel <br />concurrently with the development a gravel mining system which will have the least impact on the channel and <br />the surrounding areas. <br />. ~ <br />USE , <br />AREA <br />IN AC. - <br /> <br />OF TOTAL <br />E>astin Permit 29.8 85.6 <br />Pro sed Addition 5.0 14.4 <br />TOTAL 34.8 <br />Gravel Extraction 6.2 17.8 <br />Sta in Area 14.4 41.4 <br />Buffer/No Minin 14.2 40.8 <br />