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• III IIIIIIIIIIIIIIII ~CIIF. 1'Ui ~.Oi1~CCf~'~Ofu March 16, 1995 RECEIVED JUN 2 3 1995 Mrs. Susan B. Nall US Army Corps of Engineers Sacramento District Western Colorado Regulatory Office 402 Rood Avenue, Room 142 Grand Junction, Colorado 81501 Re: Thomas Pit Division of Minerals ~ Geology Permit Application Number 19975260 Dear Mrs. Nall: [icady Mix i_'oncrcle P. U OUY IA79 COIiTLZ. COI U. 0132 PHONE f303~ Gfi53]10 The following are revisions to the Thomas Pit - (404 permit application) and Ire submitted for your review and approval. If you have any comments or suggestions, please do not hesitate to call. Regarding Mr. McNure's letter of February 23,1995, please refer to items one through five of that letter. We will respond as follows: Area of the northwest corner permit area = 109,730 ftz Area of the western dredge basin (between station numbers 4+00 and 18-~00) _ 225,457 ftZ Area of the ditch from the sand wash plant to the settling pond = 1,853 ft~ Area of the settling pond for the sand wash plant = 20,899 ft~ 2. The area to mined was once the site of a dredge mining operation which IE~ft a large hole and channel next to the river. Separating the dredge hole and the channel from the river is a dike that is approximately 1,400 feet long and varies in width from 15 to 25 feet. The channel and hole are on the west side of the river's main stream and during heavy run -off are flooded by water from the river. This runoff deposits sand and gravel in the hole and channel. The channel into the dredge hole is blocked during low water in the spring and fall during low water in the river. The sand and gravel is then removed from the channel by using excavators and front end loaders, etc. as required. The extraction of material is restricted to the dredge hole and channel and does not follow the same sequence each year.