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. iii iiiiiiiiiriii rii <br />^ ^ <br />~~~~~ Public once <br />US Army Corps <br />of Engineers <br />Sacramento District <br />1325 J Street <br />Sacramento, CA 95814-2922 <br />Public Notice No. 199275153 Date: July 12, 1993 <br />In Replyy Refer to the Comments Due: August 12, 1993 <br />above Publlc NotlCe No. <br />Q.B. ARMY, CORPS OF ENGINEERB~ SACRAMENTO DISTRICT <br />AND <br />STATE OF COLORADO, DEPARTMENT OF HEALTH <br />TO WHOM IT MAY CONCERN: <br />BDHJECT: Application for a Department of the Army permit under <br />authority of Section 404 of the Clean Water Act (CWA) and for <br />water quality certification under Section 401 of the CWA to <br />retain and discharge dredged and fill material in and adjacent to <br />the San Miguel River, as shown in the attached drawings. <br />APPLICANT: Telluride Gravel, Inc. <br />Post Office Box 445 <br />Telluride, Colorado 81435 <br />LOCATION: The project site is located in and adjacent to the San <br />Miguel River just above and below its confluence with the South <br />Fork River approximatley five miles west of Telluride. The legal <br />description is Sections 31 and 32, Township 43 North, Range 9 <br />West, San Miguel County, Colorado. <br />PURPOSE: To facilitate sand and gravel mining operations. <br />PROJECT DESCRIPTION: The applicant proposes to continue annual <br />extraction of sand and gravel below the confluence of the San <br />Miguel and South Fork ~ivers in an area referrbd to as the gravel• <br />harvest area and from bar accumulations at the Confluence. A 940 <br />foot berm, comprised of 4,750 cubic yards of streembank and <br />alluvial fill material, separates the harvest area from the main <br />channel. The berm is parallel .to the north side of the main <br />channel and was created when a section was excavated behind it to <br />form a deposition area. During spring runoff, the upstream end <br />of the berm is opened (the lower end always remains open) and <br />partial flow is allowed into the harvest area where bedload <br />material deposits and the water reenters the main channel. <br />Depending on where the majority of aggregate is deposited when <br />flow subsides, the upper berm is either closed (approximately 550 <br />cubic yards of berm is replaced) to isolate and mine the <br />deposition area or a low water crossing is made across the inlet <br />to access gravel bars formed at the confluence. Harvest area <br />gravel is excavated by hydraulic excavator to a depth of about <br />seven feet and loaded directly into trucks for transport to the <br />processing area. An estimated 25,000 tons of gravel material is <br />mined annually from this area. <br />