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iii iiiiiiiiii <br />r STATE ~i <br />COLORADO <br />DIVISION Of MINERALS AND GEOLOGY <br />Depanmem ui Nalu ral Resources <br />111 S Sherman 51., RUOm ?1 5 <br />Dcover, Cnlorarlo xu?03 FACSIMILE WITH HARD COPY TO FOLLOW <br />Phnnr' 1411 i) fl66 3567 <br />FAX. LNl {I K32-fl 106 <br />February 13, 1998 <br />Mr. Jeff Gregg <br />Hall-Irwin Sand & Gravel <br />P.O. Box 519 <br />Greeley, CO 80632 <br />RE: Baseline Resource, File No. M-97-058 <br />Slurry Wall Quotation <br />Dear Mr. Gregg: <br />II~~~ <br />nEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5. Eoc hhead <br />Execwne Direcmr <br />Michael R Eong <br />D rviaion Dnecror <br />The Division of Minerals and Geology (DMG) received your quotation <br />for slurry wall construction on February 6, 1998. Please provide <br />the following information. <br />1. A description of all equipment used in the slurry wall <br />installation. <br />2. We do not have equipment specifications, cycle time, and <br />hourly cost summaries for the large hydraulic excavator you <br />plan to use. Please provide the ownership cost per hour, operating <br />and overhaul cost per hour, operator cost per hour, horsepower, <br />weight, basic cycle time, rated bucket capacity, bucket fill factor, <br />and bucket size class for the excavator. <br />3. A breakdown of mobilization costs for each piece of equipment, <br />including the number of pilot cars, trailers and sizes, etc. <br />4. Width of the trench, method of excavation, composition of slurry, and <br />source and unit cost of slurry material. <br />5. Composition and source of components of clay plug material. <br />6. Installation method for both the slurry and clay plug. <br />7. Testing and quality control method. <br />Please call me if you have any questions. <br />Sincerely, ~ <br />~' q rte, ~ // ~ <br />Gary Cu/rtiss <br />Environmental Protection Specialist <br />cc:Carl Mount, DMG <br />Allen Sorenson, DMG <br />c:\97058bnd.wpd <br />