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EMD-82-80 1 (1982-05-07)

handle is hein.gao/gaobabdiu0001 and id is 1 raw text is: UNITED STATES GENERAL ACCOUNTING OFFICE WASHINGTON, D.C. 20548 May 7, 1982 CHERGY AND MINERALS DIVISION RELEASED B-207537 iET~Tr ~'de t) Gneral Accountiu~g Q'if ex c t a 0 specific approval by the Office of Congressionl fielations The Honorable Max Baucus I I~Dl United States Senate 118606 Dear Senator Baucus: Subject: Analysis of Bonneville Power Administration's Estimate to Bury Segments of Transmission Line in Montana (GAO/EMD-82-80). Your January 22, 1982, letter asked that we analyze Bonneville Power Administration's (BPA's) cost estimates to bury segments of high voltage transmission lines in Montana. We briefed your staff on the results of our work on April 22, 1982, at which time it was requested that we put our results in writing. Specifically, you asked that we --evaluate the validity of BPA's cost data for burying por- tions of a twin 500 KV 1/ transmission line and --analyze the general engineering reliability and safety con- siderations of burying such lines. We found BPA's estimates of $7.1 to $7.4 million per mile to bury the transmission lines are reasonable. However, because this type of installation is not common, uncertainties exist which could make the actual costs hiaher or lower. For this same reason, little is known about the engineering, reliability, and safety considerations of underground installation for lines of this size. OBJECTIVES, SCOPE, AND METHODOLOGY Our objective was to address your specific concerns. We con- ducted our review in accordance with GAO's Standards For Audit of Governmental Organizations, Programs, Activities, and Functions. I/A unit of measure equal to 1,000 volts. (005269)

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