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Page 2 <br />July 1, 2013 <br />Mr. Tom Kaldenbach <br />Colorado DRMS <br />the Debetz pit from the construction of the South Platte Interceptor (SPI) pipeline <br />for the Northern Treatment Plant. MWRD will deliver the trench spoils to Debetz <br />Pit and the County's Public Works Department will place the spoils in Debetz Pit. <br />It is anticipated that shallow portions in the northeast portion of the Debetz Pit will <br />be filled to reduce the surface water area by approximately 6.0 acres (Attachment <br />2). A technical memorandum summarizing the proposed spoils delivery program <br />from the SPI pipeline is attached (Attachment 3). <br />The material imported to Debetz Pit from the SPI trench spoils is expected to be <br />inert fill consisting of mostly silt, sand, and gravel. MWRD has conducted <br />extensive investigations along the SPI trench alignment including hazardous <br />materials studies and laboratory testing in select areas. A memorandum provided by <br />MWRD reports there is no evidence of hazardous materials along the pipeline <br />corridor. A copy of the MWRD memorandum is attached. During construction, an <br />MWRD representative will perform visual and odor screening of each truckload of <br />trench spoils and report the results to the Adams County Parks Department for <br />review and approval before delivering to Debetz Pit. <br />Revegetation of the newly - placed fill material will be conducted in general <br />accordance with the approved reclamation plan and will include seeding with native <br />grasses, shrubs, and trees to match the surrounding landscape. The approved <br />reclamation plan in 1978 called for planting cottonwood, willow, and Russian olive <br />trees. However, Russian olive trees will not be planted as part of the revegetation. <br />Revegetation of the Debetz Pit fill material will provide wildlife habitat and <br />recreational /fishing opportunities that comply with the approved reclamation plan. <br />Schedule: <br />Construction of the Debetz Pit inert fill project is expected to begin in September <br />2013 and end by October 2015. The Debetz Pit inert fill construction schedule is <br />entirely dependent on the progress of the SPI construction and delivery of inert fill <br />material by the pipeline contractor. <br />Please let me know if you have any questions or require additional information. I <br />can be reached at 303 - 264 -1090 or tdaigle(cr�geiconsultants.com. <br />Sincerely, <br />Thomas Daigle, P.G. <br />Project Geologist <br />