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i ~ .. • i James L. Schmieding 15 June 1979 Project No. 0057-24-02-01 Page 3 f. Possible aquifer contamination will be prevented by limiting the type of material that may be dumped into the landfill as stated in the aforementioned letter from the Assistant to the Public Works Director. The Streets and Alleys Department of the City of Loveland indicated to us that the only time tree limbs and other organic related material will be dumped in the landfill is after an infrequent weather event such as an early spring snow storm. The City of Loveland does not provide normal removal of debris. The Street and Alley Department also stated that they are presently considering recycling broken up asphalt for base course material and are confident that it will be recycled before this pit is available as a landfill. They also do not anticipate dumping of broken concrete since most of it is saved for riprap material. The Radiation and Waste Division of the Colorado Department of Health has been contacted and landfill approval is being sought. g. As stated in the Soil Conservation Service Vegetation report, the native trees are mostly cottonwood trees; therefore, it is planned to plant Siouxland Poplar trees also known as seedless cottonwoods. h. Approximately 34 acres will be topsoiled, regraded, and revegetated. The remaining acres will be the water surface of the proposed ponds. i. The dump will be compacted in approximately six foot lifts by bulldozer. It is not felt that significant compactive efforts are practical or necessary since nearly the entire area lies within the 100 year flood plain of the Big Thompson River and is therefore unusable for building purposes. j. The Soil Conservation Service has recommended seed types and methods for planting. A copy of their recommendations that will be followed is atta~hed. k. The surface acreage of each lake and the estimated depths are shown on Exhibit F. In summary, removal Areas 1 and 2 may get as deep as 21.5 feet. Areas 3 and 4 may reach depths in the vicinity of 13.5 to 14.5 feet in depth. 3. Mining Plan a. Twelve to thirty inches of.topsoil will 6e taken off. See Exhibit I for overburden depths. b. Approximately 3 to 4 acres of surface area will 6e mined each year. The following is an estimated time table for the extraction process based upon a total of 50 acres being mined in fifteen years.