1. Controlling Salt in the Colorado River Kib Jacobson Colorado River Basin Salinity Control Program Manager

2. The Colorado River Basin 246,000 square miles Water for 35 million people More than 4 million acres irrigated

3. The Problem Historically, 9 million tons of salt passed Lees Ferry every year 47% occurs naturally 53% is human-caused

4. 9 million tons of salt would require The Colorado River is 1,450 miles long a train of hopper cars about 1,000 miles long

5. COLORADO RIVER BASIN – Yellow outline Red: Upper Cretaceous salt –bearing formations Federal lands – Lt. Green Approx. 40% of Basin

6. Source Sectors

7. Grand Valley CO Saline Springs and Groundwater Discharges Natural Salt-Loading

8. Evaporation, Transpiration, and Erosion Price, UT

9. Natural Salt-Loading La Verkin Springs

10. Human-Caused Salt-Loading Irrigation Practices

11. Irrigation Sources

12. Human-Caused Salt-Loading Reservoir Operations Lake Powell

13. Crystal Geyser near Green River Utah Human-Caused Salt-Loading

14. Damages Sectors

15. Agricultural Damages Increases water use and operating & maintenance costs Lower yields and limits type of crop Crop Production

16. Municipal Damages Additional treatment required and reuse capability reduced Accelerates appliance and pipe deterioration

17. Industrial Damages Additional treatment required for high tech applications Accelerates pipe and machinery deterioration

18. Colorado River Basin States In cooperation with Reclamation Clean Water Act of 1972 Plan of Implementation Numeric Criteria Water quality standards that include:

19. The Numeric Criteria Based on 1972 salinity data Calculated as a Flow-weighted Average Annual Value Measured at three locations in the Lower Basin

20. Numeric Criteria Hoover - 723 mg/L Parker - 747 mg/L Imperial - 879 mg/L