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<br />Task 7--Survey and Topography. <br /> <br />1. Acquire existing aerial photography conducted recently <br />by the Bureau of Reclamation, the Bureau of Land <br />Management, and the United States Geological survey <br />(USGS) . <br /> <br />2. Review existing topographic mapping for the area <br />including the USGS maps at 20 feet contour interval. <br /> <br />3. Produce new aerial photographs and new topographic <br />mapping for the pipeline corridor selected in Task 6. <br />Scale 1 inch equals 100 feet, contour interval of 2 <br />feet. This aerial photography must await clearance of <br />snow due ing the spr ing thaw. ~ve assume that the snow <br />will be cleared by the time the project schedule calls <br />for aerial photography to be performed. <br /> <br />4. <br /> <br />Establish <br />utilized <br />utilities <br /> <br />a survey control line from the panel points <br />in part 3 above and reference existing <br />to the control line. <br /> <br />Task 8--Geotechnical Analysis~ <br /> <br />1. Provide soil borings at approximate 1000 feet intervals <br />along selected pipeline corridor. Soil borings to be <br />15 feet deep with column analysis at 5-foot intervals. <br />Five piezometers will be installed at field determined <br />sites. <br /> <br />Task 9--Preparation of Final Report. <br /> <br />1. Submit draft feasibility report and preliminary design <br />plans for the project to the CweB and City of Cortez <br />for review. These plans will identify preliminary pipe <br />elevations and necessary pipeline appurtenances. <br /> <br />2. Incorporate comments made by CWCB staff and City of <br />Cortez during their review. <br /> <br />3. Print and provide 10 bound copies of the final report <br />to the evICB. <br /> <br />Special Engineering Services <br /> <br />Special engineering services, which constitute other <br />duties not specifically mentioned above, shall be performed by <br />Brown and Caldwell at the option of the Colorado Water <br />Conservation Board and the City of Cortez and upon mutual <br />agreement of the terms and conditions of such additional <br />assignments. <br /> <br />Exhibit A-4 <br /> <br />3/l5/85-R <br />