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.- III IIIIIIIIIIIII III 999 ~r; ...r t US rmy arps of EngineersSacramento 1325 J Street Public~Notice Public Notice Number: 199475348 district DENVER Date: March 13, 1996 Sacramento, ca s5sia-zszz OFFICE Comments Due: April 15, 1996 In reply, please refer to the Public Notice Number TO WHOM TT MAY CONCERN: SUBJECT: Application for a Department of the Army permit under authority of Section 404 of the Clean Water Act (CWA) and for water quality certification under Section 401 of the CWA to continue fill and excavation activities associated with mining approximately 4,000 cubic yazds of sand and gravel from a point bar located in the Animas River, as shown in the attached drawings. APPLICANT: SANDCO, Incorporated Attn: Mr. John Dillon Post Office Box 1773 Durango, Colorado 81302 LOCATION: The project site, referred to as the Walker Pit, is located approximately four miles north of the City of Durango on the Animas River within the NW 1/4 of Section 27, Township 36 North, Range 9 West, La Plata County, Colorado. PURPOSE: To continue excavating sand and gravel for commercial sale. More specifically, the project purpose is to supply the general public and various governmental agencies with sand and gravel products (including concrete) required for the construction and maintenance of roadways; foundations and superstructures for commercial buildings, hospitals, city and county buildings and all appurtenances; residences; raiiroad bed ballast; pazking areas; bridges for highways and railways; drainage materials for highway construction, superfund sites and all other private and publicly owned facilities requiring use of sand, gravel, and concrete products. PROJECT DESCRIPTION: Mining operations at the Walker Pit involve excavating, loading, and hauling sand materials annually deposited on a point bar of the Animas River. Typical mining operations include the construction of an alluvial berm approximately 1.5 feet high along the low water edge to prevent disturbed sediment from entering the nver. The applicant then uses afront-end loader or backhoe to periodically excavate and remove sand by skimming those deposits located above the low water elevation of the river. Based on this method of mining, this extraction of sediment coincides with seasonal low flow periods occumng in late fall, winter, and early spring. Although drawings of the point bar area indicate approximately 8,000 cubic yards of available material, the applicant estimates an annual excavation of approximately 4,000 cubic yards.