Laserfiche WebLink
<br />000076 <br /> <br />CONCLUSIONS <br /> <br />. <br /> <br />1. If we continue with all salinity control units, with the programmed <br />FY 1985 preconstruct ion starts and accomplishment levels (includes USDA and <br />BLM), we would expect to see the TDS numerical criteria of 879 mg/L satisfied <br />until 1995. Salinity concentrations would fluctuate around that level until <br />2015 with about a 50 percent chance of exceeding the numeric criteria in any <br />one year. By 2015, salinity concentration would rise to a new equilibrium <br />point of about 900 to 910 mg/L. <br /> <br />2. If we were to discontinue all salinity control efforts and rely on the <br />CREST program (1986 to 1990), we would expect to meet the numeric criteria up <br />until 1990. However, even if the basinwide operational program were authorized <br />and commenced in 1991, we would still expect to see the salinity concentration <br />rise evenly to.a range of 1000 to 1020 mg/L by the year 2020 if the projected <br />streamflow enhancement levels are realized. <br /> <br />3. If we were to implement all available structural and augmentation <br />measures included in (1) and (2) above regardless of costs or other con- <br />straints (100 percent accomplishment), we would expect the average salinity <br />concentration at Imperial Dam to be below 820 mg/L. This level could be <br />maintained out to the year 2020 with about a 25 to 30 percent chance of <br />exceeding the TDS numeric criteria in anyone year. <br /> <br />4. If any management decision is made to change Reclamation's basic plan of <br />implementation or schedule for salinity control, the other key program <br />participants (the Forum, basin states, USDA, EPA, and BLM) should be judi- <br />ciously consulted. <br /> <br />. <br /> <br />18 <br />