Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />proposed Dolores/Towaoc Canal. These alignments, however, are siqnificantly <br />longer and with pipeline costs in the rang~ of $l~O,OOO per mile, they were <br />ruled out on the basis of economics. <br /> <br />The most diverse alignments examined, other than those discussed, would <br />proceed west from the Cortez treatment p1 ant and pass on the west si de of <br />Cortez. The significant rock and canyon lilnd terrain that would be <br />encountered without shortening the length of the pipeline made these <br />alignments impractical. In addition, some of this region is highly populaterl <br />\~ith archeological sites and would have a high risk for numerous alignment <br />alterations or delays in the process of selecting a final route. <br /> <br />The ground profile along the two alternative alignments are similar in the <br />upper half of the pipeline route. The lower portion of the two routes vary <br />somewhat more, in that Alignment A presents a more uniform grade than <br />Alignment B. This has no significant effect on the pipe except that Alignment <br />B will traverse four or five deep arroyos along the state highway and must <br />also cross Navajo Wash just inside the Reservation boundary. The elevation at <br />Navajo Wash is approximately 100 feet lower than the lowest point on <br />Alternative A. This creates a short reach of hiqh pressure that will require <br />more expensive pipe for some of the pipe tyoe alternatives. Fiqures 3.7 and <br />3.8 illustrate the ground profil e, hydrau1 i c grarle 1 i nes, anrl range of pipe <br />sizes for Alignments A and R, respectively. <br /> <br />3.8 Rights-of-Way and Utility Interferences <br /> <br />For a gravity pipeline, the physical characteristics of hydraulic grades, pipe <br />size, ground conditions, and materials are the common factors evaluated in <br />selecting pipeline alignments. Just as important, however, for total project <br />costs and time schedules are consideration of needed right-of-way and <br />potential interferences with other utilities. <br /> <br />With a fast track time schedule for planning, design, and construction defined <br />for the Towaoc pipeline, the evaluation of right-of-way and other utility <br />considerations become one of the major issues. Normally a project of this <br /> <br />3-34 <br /> <br />l060c <br />