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<br />Appendix B <br /> <br />~ <br /> <br />TETRA TECH RMC <br /> <br />January 21,2004 <br /> <br />Mr. Terry McKee <br />U.S. Army Corp of Engineers <br />Tri-Lakes Project Office <br />9307 South Platte Canyon Road <br />Littleton, Colorado 80128-6901 <br /> <br />Re: Fulton Irrigating and Ditch Company - South Platte Diversion Hydraulic Cutoff; <br />Tetra Tech RMC Job No. 19-0080.048.00 <br /> <br />Location: Township 2 South, Range 67 West, in the Northeast One-Quarter of the - <br />Southeast One-Quarter of Section 17 <br /> <br />Longitude: 390 53', Latitude: 1040 54' <br /> <br />Dear Mr. McKee: <br /> <br />Tetra Tech RMC has completed a design to halt the undermining of an irrigation diversion <br />structure on the South Platte River. The remedy is to install sheetpiling and a concrete seal on <br />the overflow portion ofthe existing structure. Recently there has been seepage under the <br />structure, which will over time undermine and cause a failure. Enclosed herewith is a single <br />sheet design that depicts our proposed repair. <br /> <br />During the proposed work, a temporary working platform oflocal soil will be needed to set up <br />the necessary equipment. This will be a fill in the river next to the structure. This material will <br />be removed from the river and the existing contours replaced at the end of the project. <br /> <br />REQUEST <br /> <br />Tetra Tech RMC requests that the U.S. Army Corps of Engineers review our proposed remedy to <br />determine if a USACE permit is required. A letter is requested so that the proposed project can <br />continue to construction or requesting revisions be made to satisfy the Corps. <br /> <br />JAi\, 2 2, 2004 <br /> <br />1900 S. Sunset Street Suite 1 -F, Longmont CO 8050 I <br />Tel 303.772.5282 Fax 303.665.6959 <br />www.ttnnc.com <br /> <br />- ._~- ,-.- -------- <br />LM ~_,__~. ._"__. ___" _'- . <br />