2002-05-03_REVISION - M1976020 (2)

Home Browse Search

05/03/02 FRI 10:49 FAA 9702593631 DURANGO CONSTUCTION DEPARTLAENT OFTHE ARMY JUN 2.4 2002 U.S. ARYY ENGINEER DISTRICT, SACRAMENTO .~ CORPS OF ENGINEERS Diaisioa of Minerala and GeolopY 7325 J STREET affirm SACRAMENTO, CAUFOflNIA 958742922 A17EN10"'°° May 1, 2002 Regulatory Branch (200275200) Mr. Monte Potter Four Corners Materials, Inc. P. O. Box 2707 Durango, Colorado 81302 Dear Mr. Potter: /Tlwwuts Pit ~Pe~Mrf No. /~~I/i -a f N,-i47G -v Lo /FoUlCdrnerg Ala~er~Q~s, ~n~ ~~NVER ~F"~I~f; This letter is in reference to the pre-construction notification, submitted by Sugnet F.mironmeatal on behalf of Four Corners Materials, ret(uesting verification under Regional Genera! Permit Number 37 for bank stabilization aciivrdes at tbe Thomas Pit project area. The project is located on the Animas River, within Sections 25 and 36, Township 37 North, Range 9 West, La Plata County, Colorado. A project location map is enclosed. We have reviewed the information provided, and request the following information in order to complete our evaluation of the proposed activities: 1. Given the depth of the proposed gravel pit and its proximity to the Animas River, an independent third-party review of the proposed bank stabilization plans must be conducted and submitted to this office. The third-party evaluation must be conducted by a person with expertise in fluvial geomorphology. The evaluation should address the effects (if any) of the proposed bank work on velocities through this reach of the river, the adequacy of the bank stabilization design to withstand a 100-year event; and potential effects of bank failure on river channel geometry and stability, and on property in the vicinity of the project. 2. A detailed revegetation plan, including plant list, application rates, and temporary irrigation must be provided. The percentage of topsoil (relative to the total material) to be placed between the concrete blocks, as well as soil compaction methods, must be specified to ensure that willow plantings will be successful. Please provide the required information by Tune 3, 2002. If we have not received the information by that date, the permit application wil(be considered withdrawn. This action would not preclude the filing of a new application for the proposed work. However, taahppe additional infyformatoon which we have requested must be included wrth your new SawyceilDrivef //1uDurangoy Colorado 81303, telephonee(970 375-945g~latory Office, 278 Siyncerle/lye,,,' 0 ~~ I~~ Lesley McWhirter Chief, Duraago Regulatory Office Sacramento District ~ ooz aecetved ~N~ ° ~ ~ putatt9o.nee~s &t~o1e9'1 pNisio~ of M