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memorandum. Recommendations regarding geogrid length and rock placement at the <br /> base of the wall were completed. <br /> • The foundation drain was installed as shown on Sheet S3. A drain under the wall was <br /> placed at approximately Station 18+80. The plans did not indicate an outlet for the <br /> foundation drain;therefore, a drain was installed by placing a"tee" in the drainage <br /> pipe at approximately Station 18+80, then attaching a short pipe section under the <br /> wall. The pipe outlet was covered with rock. <br /> 3.5 Roadway Construction <br /> The roadway was constructed in general accordance with the plans and specifications. <br /> The roadway slope between Station 16+50 (final elevation 8,660 feet) and Station 19+50 (final <br /> elevation 8,635 feet) is 15 percent. <br /> Field conditions encountered during construction resulted in the following changes: <br /> 3.5.1 Roadway Alignment <br /> • Road alignment from approximately Station 15+00 to Station 16+50 was moved 25 <br /> feet to the north to accommodate a 25-foot offset from the property boundary. <br /> • <br /> 3.5.2 Road Subbase and Surface <br /> • The existing roadway was scarified a minimum of 12 inches and recompacted. The <br /> roadway approximately between Station 24+75 and Station 25+25 was excavated to a <br /> depth of 24 inches, filter fabric was placed, and material was replaced and compacted. <br /> • Road base was changed from 2"-minus crushed rock to 3"-minus aggregate base <br /> course(ABC). This change was made because of product availability. (Note: 3"- <br /> minus ABC is recommended by Colorado Department of Transportation(CDOT) for <br /> road sub-base.)Appendix B of this attachment contains geotechnical information on <br /> the 3"-minus ABC. <br /> • The fill material used for backfill and road subbase met the size criteria as described <br /> on Keyed Notes No.4 on Sheet S3. However,compaction testing was not possible <br /> due to the presence of over 30 percent rock in the 6"-minus engineered fill. The <br /> Contractor directed Western Technologies of Durango, Colorado to collect a sample <br /> of the backfill material for compaction testing. Mr.Fred Hampton of WTI informed <br /> the Contractor that the backfill material contained more than 34 percent rock and <br /> therefore could not be tested for compaction, even with a rock correction factor. <br /> As-Built Technical Summary April 29,2014 <br /> New Access Road Page 4 <br />