Record Details
page C-21
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page C-21 Final environmental statement : authorized Jensen Unit, Central Utah Project, Utah, page C-21 |
| Coverage | Electronic reproduction; |
| Format | C-21 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; unit conditions the flows would be fairly consistent and the magnitude of flows would be controlled to make gradual fluctuations table C 4 gives the flows of little brush creek for the period of study 19301972 1930 1972 the jensen unit would not affect the flows of this stream streamflows Stream flows are quite consistent from year to year ranging from 0 to 20 cfs cs the gage on little brush creek was established 2.2 22 22 miles upstream from the mouth but because of insignificant intervening flow the recorded flows are representative of the flows at the mouth table C 5 gives a composite of the flows of big and little brush creeks interflow from the intervening area elev 5400 to 5800 feet would be insignificant at the lower tower elevations historically the average daily flows are continuous throughout the year ranqing randing from 16 cfs cs in the winter to 126 cfs cs in the summer under jensen unit conditions the winter october through april average daily flows would be reduced to approximately 26 percent of historical values spring may and june average daily flows would be reduced to approximately 48 percent of historical values and late tate summer august through september average daily flows would be reduced to approximately 34 percent of historical values table C 6 gives historical recorded flows and estimated flows under jensen unit conditions since the historical period of record 19391972 was sufficiently long to represent all alt ali ail hydrologic conditions it was not extended for the period of study 19301972 1930 1972 in the past the stream has been almost entirely diverted for irrigation and it is presumed that this practice would continue in the future winter flows with the unit would be reduced to approximately 32 percent of historical flows b effects on the stream channel and flood control below tyzack dam approximately three miles of big brush creek down to little brush creek would have essentially no flow during the winter months table C 3 except for some localized snowbelt snowmelt snow melt rainstorm runoff and seepage past the tyzack dam the runoff from this area would be insignificant in quantity and would occur only randomly reservoir spills or releases for flood control operations which would occur occasionally would range from 7 to 200 cfs cs flood studies by the bureau of reclamation indicate a 100 year flood flow of 3600 cfs cs a 25 year flood flow of 560 cfs cs and a 5 year flood flow of 400 cfs cs these flood flows not given in tables C 3 through C 6 are considered as instantaneous flows not average daily C 21 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/4987 |
