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I I I I I I I I I I I I I I I I I I I JCHA Rueter.Hess Reservoir Proiect Descriotion Januarv 2000 The results of the KP studies that have been conducted to date indicate that there are no geotechnical factors that preclude the ability to build the desired structure based on the data available to date. Specific findings of these studies include: (1) The proposed dam abutments contain some non-cemented sandstones and possibly some unconsolidated sand, as well as being underlain by hard to very hard, low-permeability claystone. (2) The porous materials on the abutments may require some engineering treatment. (3) The valley bottom contains significant quantities of porous sand and gravel, which likely will have to be removed from the dam footprint prior to construction. (4) Areas outside of the valley bottom are underlain by silty to clayey sand and sandstone, which offer good embankment founding conditions. Further geotechnical work will need to be done for a complete assessment of the Rueter-Hess Reservoir area, as well as the dam axis. However, these preliminary studies were used in developing initial cost estimates for the Rueter-Hess Dam. Environmental baseline studies were initiated at the Rueter-Hess Reservoir site by Woodward Clyde Consultants (WCC) in 1998. These environmental baseline studies included an evaluation of cultural resources, paleontology, vegetation, and wildlife. A second study was also performed by WCC in the summer of 1999 to further evaluate threatened and endangered species. The results of the WCC environmental baseline studies indicate that there will be environmental issues associated with this site. However, none of the issues raised by WCC is considered to be a fatal flaw. The studies conducted by WCC have yielded the following preliminary conclusions: 561li-Dec-rpt -8-