Record Details
page 155
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 155 Central Utah Project, Bonneville Unit : Diamond Fork Power System : final Environmental Impact Statement, page 155 |
| Coverage | Electronic reproduction; |
| Format | 155 text/PDF |
| Rights | Brigham Young University; http://lib.byu.edu/about/copyright/generic.php Public Domain Public |
| Language | English; eng; en |
| Relation | Central Utah Project; Western Waters Digital Library; CHAPTER IV AFFECTED environment AND environmental consequences sixth water creek is the only stream within the project area that would be adversely affected by implementing the recommended plan reductions in trout habitat would occur because the historically high irrigation flows from strawberry reservoir which flow through the sixth water creek channel would be diverted through syar tunnel into syar and sixth water reservoirs the sixth water creek channel would revert back to carrying natural flows throughout the year which would be much less than the high f flows lows it has been carrying and to which the channel has become adapted through the hydrologic process of scouring and bank erosion the much lower natural flows would be unable to provide the existing level of trout habitat because of the unnaturally widened and deepened channel reach 3 of sixth water creek would exhibit the greatest impact with reductions in standing crop habitat units and angler use of 44 percent 45 percent and 68 percent respectively over existing conditions the interagency biological team evaluated channel rehabilitation and other measures for improving the fishery potential of sixth water creek this evaluation is discussed under impacts associated with the 1964 DPR alternative additional mitigation for the recommended plan is not required because of the overall enhancement created on lower diamond fork and the spanish fork river As long as the diamond fork pipeline at its present capacity is an integral part of the recommended plan funding of any measures to improve the fishery potential of sixth water creek would not be justified and would have to come from other sources reclamation however recognizes the desirability of maintaining a fishery f in sixth water creek and is committed to working with the forest service and other resource agencies to achieve a satisfactory solution to the problem to provide a potential solution to the problem a flow low f bypass valve would be included in the connection between syar tunnel and the existing straw berry tunnel this valve would allow the release of up to 50 cfs cs into sixth water creek to support the stream fishery if flows are available construction and operation of monks hollow dam and reservoir would effectively block upstream movement of trout from lower diamond fork and the spanish fork river potentially this could affect historical trout spawning success in these two streams especially since recruitment from strawberry reservoir through the strawberry tunnel would be discontinued and streamflows stream flows in sixth water creek would be much reduced under project operation the existence and significance of trout spawning migrations into the upper reaches of these two streams is presently unknown based on a fish ish f habitat inventory study conducted by UDWR in 1975 and 1976 it is believed that trout reproduction on sixth water creek occurs throughout reach 3 and in dip vat creek which is a tributary to sixth water creek thereby providing the necessary recruitment to sustain existing populations brown trout the dominant game fish ish f in reaches 2 and 3 have historically sustained their numbers through natural reproduction without recruitment from strawberry reservoir or lower diamond fork on 155 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/3005 |
