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<br />I <br />I <br />. <br />I <br />J <br />II <br />L <br />I <br />, <br />. <br />I <br />I <br />. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TRANSMISSION INVESTMENT <br /> <br />The following tabulation shows the transmission lines, their <br /> <br /> <br />voltage and approximate length as presently proposed to meet the prefer- <br /> <br /> <br />ence customer load conditions assumed as of 1970, 1975 and 1980. <br /> <br />Many of the lines will be constructed over rugged terrain making <br /> <br /> <br />straight lines in many cases difficult or inadvisable. Knowledge in this <br /> <br /> <br />connection could only be gained by actual reconnaissance or survey. TWs <br /> <br /> <br />has not been done. For the purpose of tWs report ten percent or more <br /> <br /> <br />has been added to all scaled distances for purposes of estimating costs. <br /> <br />Likewise substation arrangements, corrective equipment in- <br />stallations, intermediate switcWng and sectionalizing arrangements and <br /> <br />communication system can only receive tentative determination at tWs <br /> <br /> <br />time. Ample allowance has been made in the following tabulation of es- <br /> <br /> <br />timated costs to cover these features. <br /> <br />It is anticipated that in the interests of economy the 230 KV <br /> <br /> <br />transmission lines can in large measure be constructed with woad sup- <br /> <br /> <br />porting structures. Without at least reconnaissance-type surveys it can- <br /> <br /> <br />not be determined in advance where steel supports will be advisable on <br /> <br /> <br />account of rough terrain, extra long spans, peculiar climatic conditions, etc. <br /> <br /> <br />For the purpose of this report therefor, estimates have been made for all <br /> <br /> <br />wood as well as for all steel supports for 230 KV lines. Wood construc- <br /> <br /> <br />tion only is contemplated for 115 KV lines. <br /> <br />In summary, if all 230 KV lines were on wood structures, the <br /> <br /> <br />estimated construction cost for the entire transmission system, including <br /> <br /> <br />substations, switching stations, etc., is approximately $144,000.000. If <br /> <br /> <br />steel is used for all 230 KV structures the equivalent construction cost is <br /> <br /> <br />estimated at approximately $192,000,000. Due to a combination of the <br /> <br /> <br />two types wWch is expected to compose the final system, the resulting <br /> <br /> <br />costs will probably range from $155.000,000 minimum to perhaps <br /> <br /> <br />$165,000,000 maximum. <br /> <br />- 12 - <br />