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Mr. William J. Carter <br />• Page 2 <br />June 5, 1997 <br />Item 18 -Location and implementation of the standard specifications for road construction. <br />Balaz & Associates, Inc. and Lincoln DeVore have jointly developed Sheet OXWVF-16, Road <br />Section Construction Details. The section selected provide the operator with flexibility to <br />construct the required roads with the native materials assumed to be present. Actual field <br />conditions may vary from the assumed and therefore require modification of the standard <br />specifications. These modifications will be made in the field based on input from the contractor, <br />Lincoln DeVore, and Balaz & Associates, Inc. Generally, the fill slopes are expected to be <br />constructed as a compacted fill at a 1-1/2:1, H:V slope. The use of a mechanically stabilized earth <br />is expected to be minimal. Stations 8+00' and 27+00' on the West Valley Haul Road are the only <br />areas that may require this construction method. <br />Item 24 -Depth of Colluvium Material below sediment pond dam <br />The test pit was dug and the description is included in the attached report by Lincoln DeVore. <br />The colluvium depth is too excessive to key the dam foundation into the bedrock. Therefore, <br />Lincoln DeVore has recommended an alternate construction method for the dam construction <br />• and lining the pond with native materials. The details of this alternate construction method are <br />also included in the attached report by Lincoln DeVore. <br />A complete set of revised plans are attached. These revisions include adjustment of the road <br />alignments and the cut and fill boundaries, development of the road section construction detail <br />sheet and proposal of an alternate construction method for the sediment pond dam. The complete <br />set of plans is included as all sheets except OXWVF-2 were revised. <br />Please feel free to contact the undersigned at the above address if you have any questions or need <br />additional information regarding this submittal. Thank you for your consideration in this matter. <br />Sincerely, <br />Balaz & Associates, Inc. <br />~~~~-/ <br />William P. Balaz Jr., P. <br />President <br />cc: Tom Anderson, Oxbow Carbon & Minerals, Inc. <br />file: \oxbow\wvftrrep.sam <br />• <br />