Record Details
page C-30
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page C-30 Final environmental statement : authorized Upalco Unit, Central Utah Project, Utah, page C-30 |
| Coverage | Electronic reproduction; |
| Format | C-30 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; usually receive excess water during high spring runoff under project conditions the lands would receive an assured late season water supply included in water rights and adjustment contracts with project area irrigation companies would be assurances that present excessive application of irrigation water in the spring and midseason would be curtailed this would help reduce excessive deep percolation and surface runoff with their associated loads of salts nutrients heavy metals and other substances therefore there would not be any additional flushing of high concentrations of salts heavy metals or toxic substances during project operations likewise increases in heavy metals pesticides and nutrients are not expected the only significant project impact on the water quality in the lower lake fork river as well as in in the duchesne green and colorado rivers would be an increase in salinity from stream depletion it is estimated that the average depletion at the lower end of the lake fork river resulting from the project would be about 13000 acre feet per year As a result the average annual salinity would increase by about 280 mg1 mgl mgt this effect would also be reflected in the duchesne green and colorado rivers although the increased volumes of flow in these streams would buffer the effect of the depletion on salinity table C 7 shows the predicted salinity increases at various points downstream from the project area table C 7 salinity increases preproject Pre project projected average TDS salinity increase percent river stations mgt mg1 mgt mg1 increase duchesne river near randlett utah 1080 53 4.9 49 49 green river at green river utah 495 1.6 16 lg ig 3 .3 colorado river at imperial dam 1046 1.5 15 15 1 .1 recent studies by the bureau of reclamation conclude that increasing salinity results in both direct and indirect economic losses in the colorado river basin the damages estimated at 343000 annually for each increase of 1 mgl mg1 mgt at imperial dam have a number of causes in agriculture they arise from decreased crop yields increased leaching requirements increased management costs and application of various adaptive practices in the municipal and industrial sector the detri ments arise primarily from increased water treatment costs accelerated pipe corrosion and appliance wear increased use of soap and detergents and decreased palatability of drinking water 4 existing reservoirs no change is expected in the quality of water stored in twin pots or moon lake reservoirs and only small increases in salinity would occur in water released from big sand wash reservoir C 30 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/3312 |
