Record Details
page 64
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 64 Final supplement to the final environmental impact statement : Diamond Fork System, Bonneville Unit, Central Utah Project, page 64 |
| Coverage | Electronic reproduction; |
| Format | 64 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; AFFECTED environment AND CHAPTER 111 III environmental consequences development of any required mitigation measures with the state bureau of water pollution control and the appropriate resource agen agea agencies cies cles the projected low inorganic nitrogen concentrations and relatively high phosphorus concentrations in monks hollow reservoir indicate about a 70 to 85 percent probability of blue green algal dominance at least seasonally however as discussed in the 1984 FES this is typical of northern utah reservoirs and is not an issue requiring specific control plans or mitigation measures the high hydraulic flushing rates may also induce physical mixing conditions incompatible with blue green algae dominance thus conditions may be better than predicted by existing empirical models the high hydraulic flushing rate of monks hollow reservoir exceeds the limits of great reliability in predicting eutrophy this mixing should preclude the development of dissolved oxygen problems severe enough to tause cause fish kills often associated with blue green algal blooms with operation of the recommended plan turbidity and suspended solids would be significantly reduced in the upper 6.0 60 60 go miles of sixth water creek from strawberry tunnel to last chance powerplant Power plant and in diamond fork below monks hollow reservoir as shown in table 21 sediment load and channel erosion in upper table 21 monks hollow reservoir sediment load summary recommended plan pian alternative A 1984 final environmental state ment menti feet2 feets 182800 218600 215000 total inflow acre reservoir capacity acre feet 33100 33100 31400 0.15 015 0.15 015 inflow 0.18 018 capacity to 3 92 391 91 91 trap efficiency percent 41300 00 OO 51270 1270 1310 41310 100 year deposition acre feet sediment of reservoir capacity 4 4 4 annual percent sediment release acre feet 1.1 11 ll li 1.2 12 1.2 12 12 1 figures differ insignificantly from the 1984 FES because of an adjustment for sediment storage in sixth water reservoir 2 includes both natural and syar tunnel flows 3 in years when cold water is withdrawn from below the thermocline reservoir underflow density currents may nay develop in monks in strawberry hollow reservoir under this condition the sediment trappingefficiency trapping efficiency of monks hollow reservoir would be reduced and downstream turbidity levels would be increased 4 based on annual sediment load of 14.2 142 142 acre feet at damsite adamsite dam site 5 based on annual sediment load of 13.9 139 139 acre feet at adamsite damsite and 0.3 03 03 acre feet of storage in sixth water reservoir 64 7 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/12881 |
