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HazeltinelROad Runners Rest II/Brinkmann-Woodward Gravel Pits Lining Project-Design Technical Memorandum <br />Denver Water <br />August 2003 <br />1.3 Authorization <br />GEI performed the work described in this TM under the terms and conditions of Agreement <br />07146A, entered March 5, 2003 between GEI and the City and County of Denver, a municipal <br />corporation of the State of Colorado, acting by and through its Board of Water Commissioners. <br />1.4 Project Personnel <br />Personnel from GEI responsible for the completion of this work included: <br />Project Manager Robert J. Huzjak, P.E. <br />Project Geotechnical Engineer Iqbal Ahmed, P.E.lii, Ph.D. <br />Staff Geotechnical Engineer Edwin R. Friend, E.LT. <br />Review Joseph M. Green-Heffern, P.E. <br />Note: <br />1. Licensed in states other than Colorado <br />1.5 Background <br />The Hazeltine, Road Runners Rest II, and Brinkmann-Woodward Gravel Pits (Site) are located <br />between Old Brighton Road and the South Platte River from about 112`h Avenue to 120`h <br />Avenue. The general location of the project is shown on Figure 1.1. Denver Water was <br />originally planning to convert two of these pits, the Hazeltine and Road Runners Rest II Gravel <br />Pits, into lined water storage facilities. GEI has been conducting geotechnical explorations and <br />feasibility work since 1998 to support Denver Water in this project. Recently Denver Water <br />added the Brinkmann-Woodward Gravel Pit to the project. <br />Adams County is planning upgrades to 120`h Avenue. As part of these upgrades, 120th Avenue <br />will be realigned to cross the South Platte River along the northem edge of the Road Runners <br />Rest II Gravel Pit, and a new road embankment will be constructed along the northern edge of <br />Road Runners Rest II Gravel Pit and across the adjacent Brinkmann-Woodward Gravel Pit. It <br />is anticipated that the roadway construction will begin around December 2003. Denver Water <br />intends to construct asoil-bentonite cutoff wall around the perimeter of the Hazeltine, Road <br />Runners Rest II, and Brinkman-Woodward Gravel Pits prior to commencement of the 120`k <br />Avenue upgrades. <br />Engineering evaluations, design, and construction of stable reservoir side slopes and water <br />conveyance facilities will be performed in future phases of the project. <br />The engineering analyses for this phase of the project is limited to design of the soil-bentonite <br />cutoff wall. <br />GEI CODSUItan[S, Ine. 2 o?oso o?-o.-?i in-Huaunc nas;gn t.N <br />