WSPC06339

• File Number: 8272.500.10
• Description: Colorado River Basin-Water Quality-Salinity-Organizations and Entities-CO Dept of Public Health-WQCC
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 3/14/1980
• Title: Colorado River Salinity-Water Quality Control Commission-1978 Standards-Standards and Implementation Policy Hearings-Comments on Behalf of Chevron Shale Oil Company
• Water Supply Pro - Doc Type: Report/Study

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EFFECTS OF VARIOUS FACTORS OF SALT LOADING
A T HOOVER DAM

(1942-61 Period of Record Adjus~ed'~o 1960 Condi~ions)

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Fac~or

Natural Diffuse Sources

Natural Point Sources

Irriga~ed Agricul~ure
Salt Loading

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Salt Concentrating

~Mnicipal and Industrial
Exports OUt of the Basin

Evaporation and
Phreatophytes

Storage Release From
Hoover 3/

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TOTAL

Salt Load
(in Millions
:of Tons)
5.41
1.28
3.54
(J.54)
(0)
0.15
-0.04

.0.00

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10.73

., Salinity Concentration
, at Hoover Dam
Percent Ascribable to
of Each Source y.
Salt Load mg,!l
50.4 275
11.9 59
33,0 253
(33.0) (178)
(0) (75)
1.4 10
-D.4 20
0.0 80
..1i1. ..!L
100,0 697

Portl.on of'
Salinity Concentr8Ltion
at Hoover Dam
Ascribable to
Each Source 1/
Percent

39
8

37
(26)

(11)
1

3

12

..!L

100

!lfn addition to increases in salinity from salt loading, Some factors also cause salinity
increases by removal of dilution water. The chan2es shown m~v res1l1~ r~nm either or both.
3/ Computed annual values for balancing based upon the net drawndown over the 1942-61 period.

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