RES 82446 - Laserfiche WebLink

Mr. Robert L. Warh,ck September 16, 1982 Page 2 CAMP DRESSER & MCKEE INC. this investigation one location was found to be unsuitable from a geotech- nical standpoint, and the other location was found to be favorable for a reservoir site. However, this second location was not chosen and a third location at the site was designated. The geologic conditions and the seismici ty of the third location was ana- lyzed by Burkland and Associates in July 1973. The Burkland study included test trenches, interpretation of aerial photographs and a ground magneto- meter survey. A subsequent report by William F. Jones in December 1974 provided founda- tion design parameters for a 3.0 mg reservoir. No test borings or labora- tory testing were performed in connection with this report, and the recom- mended design parameters were based on information in the Burkland report. Utilizing the information described above,.the following work will be per- formed: a. Drill 3 or 4 test holes at and adjacent to the Foothill site. Perform laboratory analysis of materials collected during the drilling process. With the results from a. and b., determine the thickness and physical properties of the soil, and the physical properties of the underlying bedrock. Compare the results of c. to the geologic and soils information obtained in Task l, and to the information contained in the Burkland and Jones reports for a smaller reservoir. Perform a geotechnical engineering analysis and prepare bearing pressure and other geotechnical parameters for reservoir design. Task 3 - Preliminary Reservoir Type and Sizing Based upon the information from Task 1 and 2, alternative reservoir layouts and types will be studied for the maximum size of reservoir that can be accomodated at the existing siteconsidering known physical constraints. The reservoir also must be placed at the proper elevation in order for the overall water system to operate correctly. The reservoir types could be either above ground or partially buried. Cut materials could be used as a berm to provide visual shielding of the reservoir. An above ground reser- voir could be made of steel, reinforced concrete, or prestressed concrete. Partially buried reservoirs could be made of reinforced concrete or pre- stressed concrete with horizontal or sloped bottoms. Roof structures could be steel, concrete in a dome or flat shape, fiberglass, aluminum or wood. Conceptual layouts for the maximum size reservoir will be prepared for two or more reservoir types. Freehand drawings will be prepared for each of the conceptual layouts.