Record Details
page C-25
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page C-25 Final environmental statement : authorized Upalco Unit, Central Utah Project, Utah, page C-25 |
| Coverage | Electronic reproduction; |
| Format | C-25 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; coordinated operation of moon lake and taskeech Tas keech reservoirs under project conditions would in general decrease fluctuations in the water level of moon lake reservoir particularly by decreasing late summer drawdowns draw downs As shown in table C 6 in an average year late summer content of the reservoir would increase by an average of 4050 acre feet over historical conditions during an average year the surface area would fluctuate by about 294 acres or about 32 percent less than the fluctuation under historical conditions this fluctuation represents a change of 39 feet in water surface elevation about 13 feet less than under present conditions operation of big sand wash reservoir has historically involved filling the reservoir twice during the year As shown in table C 6 in in an average year the reservoir filled to capacity during the winter releases were made during early spring partially drawing the reservoir down and then the reservoir was allowed to fill again during late spring for heavy releases to be made for summer irrigation with opera tion of the upalco unit the reservoir would be filled to capacity only once a year during late fall and winter and releases would be made during the summer drawing the water level down to the minimum pool of 1200 acre feet 4 consecutive months of an average year the fluctuation from total capacity to minimum pool represents a 53 foot change in water surface elevation under project conditions twin pots reservoir and the 14 high country lakes would be stabilized and would not undergo the fluctuations that have occurred historically the only fluctuations that are expected would be minor changes of less than 2 feet in water surface elevation annually as a result of seepage or evaporation d flood control on the basis of predicted snowmelts snow melts water would be released as necessary from taskeech Tas keech reservoir to provide space for control of floodflows flood flows moon lake reservoir would not be operated for flood control purposes so this function would need to be accomplished in taskeech Tas keech reservoir the bureau of reclamation and the corps of engineers estimate that potential flood damages averaging 14000 annually to crops and livestock would be prevented army corps of engineers 1978 6 water quality a surface water the major long term impact of the upalco unit on the areas surface water quality would be to increase moderately the salinity level of the lower lake fork river and to diminishing degrees because of the diluting effect of larger flows the duchesne green and colorado rivers as well other water quality considerations would be only minimally affected during both construction and operation of the unit water in taskeech Tas keech reservoir and in the lake fork and yellowstone rivers C 25 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/4322 |
