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a-n~. i <br />~ ~COOLEY GRAVEL COMPANY <br />- 2 - <br />soon from them on the scenics, vegetation and stabilization. Their <br />study on stream flow, drainage control and water quality of Strains <br />Gulch may be delayed since the stream quits flowing around June 1st <br />and will possibly not continuously flow again until March each year. <br />Grazing will continue on certain parts of the area. <br />Steps taken to date to maintain drainage control and water quality <br />of Strains Gulch are as follows: <br />1. A 24" concrete pipe has been laid through the quarry <br />section. <br />2. A 12' x 6' open rock-lined drainage channel has been <br />provided through the stockpile section. <br />3. Approx. 325' of 66" concrete pipe laid on the lower end <br />of the stockpile section. <br />4. Discharge from the 66" pipe flows onto and over a <br />spillway constructed of concrete and large rip-rap to <br />the original level of the stream bed. <br />Mr. James Link, Director of Research, Mining Division, Colorado <br />School of Mines Research Institute is assisting us in monitoring <br />dust and shock waves. Enclosed are copies of their proposals for <br />this work. <br />Our production plant is equipped with a Johnson-March Chem-Jet <br />Dust Suppression System. The main road has been surface treated <br />to minimize dust. <br />The Thorne Ecological Institute will advise us on the ultimate <br />use of the area affected by the mining. One possibility suggested <br />was a storage area for camping and boat trailers. A definite use <br />has not been established. <br />The area after mining operations are compplete should not require <br />anv reclamation work before being nut to anv other use. <br />The area posposed to be mined is expected to produce 20 to 25 <br />million tons over a period of 10 or more years. <br />Estimated cost of stabilization owrk to date has been $65 X000. <br />Additional cost will depend upon recommendations made by the <br />consultants on the planting of vegetation, cost of seeds and <br />plants, engineering, etc. <br />There were no surface disturbances on this property before July 1, 1969. <br />Stabilization of areas subject to erosion have been successfully <br />accomplished by means of rip-rapping and concrete pipe. <br />