Record Details
page B-69
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page B-69 Final environmental statement : authorized Jensen Unit, Central Utah Project, Utah, page B-69 |
| Coverage | Electronic reproduction; |
| Format | B-69 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; salinity conditions of the colorado river which showed an estimated 17 percent t94he yfjyhe total salt load at lees ferry being contributed by irrigation 1 the bureau of reclamation feels this latter estimate is the more realistic of those made to date in their april 1969 evaluation of the jensen unit the federal water pollution control administration now part of the environmental proli prott protection e clon dion agency indicated there were no appreciable detriments in the upper basin resulting from salinity but tqwould therewould there would be some damages in the lower basin beginningbelow beginning below hoover dam k 127 historically the dissolved solids have been increasing with the increase in man made developments in the basin records for the 19411970 1941 1970 period indicate the average dissolved solids concentration of the colorado river was 556 ngi at lees ferry 690 ngi below hoover dam and 757 mgl mg1 mgt at imperial dam it has been estimated that if the present man made developments had been in existence over the entire period the concentration would have been 609 mgl mg1 mgt at lees ferry 745 mgt mg1 mgl below hoover dam and 851 mg1 mgl mgt at imperial dam to alleviate present water quality problems and allow continued development on the colorado river system the colorado river basin salinity act was enacted in june of 1974 authorized facilities to be constructed by the federal government under this bill include a desalting salting de plant and related facilities at imperial dam on the lower colorado river and other developments at crystal geyser paradox valley grand valley and las vegas wash to improve the water quality of the river water from the upper reaches of brush creek and ashley creek is a high quality calcium magnesium bicarbonate type with a TDS total dissolved solids in the 70 to 400 ngi range the lower tower concentrations were generally measured during high flow periods and the higher values during periods of low tow flows As these streams flow through the lower tower valleys irrigation and other return flows increase the salt loads water entering from the shallow unconfined groundwater system or water table zone in ashley valley vai vat ley is highly mineralized due to the underlying gypsiferous mancos shale the water of brush creek near vernal the inflow to the proposed tyzack reservoir above irrigated areas is a calcium magnesium bicarbonate water with some sulphate the TDS is in the 100 to 600 mgl mg1 ngi mgt range just below the proposed damsite adamsite dam site little brush creek contributes to brush creek a calcium magnesium sulphate water of from 300 to 1700 mgl mg1 mgt B 69 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/5032 |
