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~ ~ ~IIIlllltlllllllllll ~o <br />TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. \ <br />HEADQUARTERS. P.O BOX 33695 DENVER. COLORADO 80233 (3031 452-6 1 1 1 <br />October 29, 1997 <br />RECEIVED <br />Bert Nesselhuf <br />31160 County Road 14 JAN 14 1998 <br />Manzanola, CO 81058 <br />Division of Minerals 8 GeobgY <br />RE: Proposed Gravel Pit <br />Beneath the La Junta-Lamar 1 IS kV Transmission Line <br />Sections 13 & 14, T 13 S, R 58 W;Crowley County, Colorado <br />r <br />Dear Mr. Nesselhuf: <br />The Engineering Department of Tri-State Generation and Transmission Association, Inc. <br />(Tri-State) has reviewed your "Mining Plan" for a gravel pit beneath our La Junta-Lamar I IS kV <br />transmission line. Tri-State has areas of concern regarding your mining proposal's effect on the <br />transmission line; safety, reliability and maintenance. Below are listed are our specific concerns: <br />I . The minimal vertical clearance (24' +-) from the conductor to ground assumes a <br />maximum vehicle height of l4' as per the National Electric Safety Code. Concluding that <br />14' is the maximum vehicle height that should be operated under the transmission line. <br />2. Tri-State has been typically asking for a minimum of 25' radius around existing <br />structures be left undisturbed. We are also concerned with the side slopes around the <br />sttuctures. These cut slopes should be left stable. There should be a ramp left for <br />transmission line maintenance equipment Co access each stntcture. <br />3. We also have a concern [hat if the excavation level extends to [he water level of <br />the Arkansas River or below, that the transmission line structures will end upon islands. <br />The "Mining Plan" indicates reclamation with grasses, but are future ponds more likely? <br />Tri-State needs dry unimpeded access to each structure. Pp D rooS e0lA I'!, I ~~ q <br />~/n~v~-2 0. C,o~s :,r~.`' ,4o clow/J To $Otcf~ Pr~o~Lga ro ~~-BNe~:-,~~c~~n e~y' <br />i..1 QV`MS wit) be b~Li/i' ~'.~ qu,~L; Q:J9.Lr D Water IeJt/I <br />Originally, you asked about costs to move the~transmission line. For this type of <br />transmission line the average cost to build new would be $90,000 per mile. The cost would be <br />higher to move the line, because it would require installation of several guyed angle structures. <br />The guyed angle structures are over twice the cost of tangent (H-frame) structures. This would <br />increase the costs [o approximately $140, 000 per mile. Not included in these costs are the <br />questions of impact to adjacent landowners, other utilities, environmental and permitting <br />CRAIG BTATION <br />Y.O. BOX 1907 <br />LRAIG, LOLORA00 81616 <br />(970181/4111 <br />MUCLA STATION <br />Y.O. BOX 688 <br />NUCU, COLORADO BII1/ <br />(Blol BBC-7916 <br />AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER <br />