Page 4

-4- III Tentative Findings on the Wellton-Mohawk district 1. There are about 90,000 acres in the projects of which some 75,000 are to be used for farming. Soil tests in the district show that the salt content of the soil in the 60,000 acres now being farmed is less than .2%, 1. e., that the soil is in excellent condition and almost all of the salt has been leached from it. In the remaining 15,000 tillable acres, salt content is 1% or less. 2. The water table for the 60,000 acres is down to about 10-12 feet. Only 3% of the district is still waterlogged. 3. The average salinity of drainage is about 6,000 p.p.m with the range from 2,500 to 18,000 p.p.m. Colorado River water delivered to the district has slightly more than 1 ton of salt per acre foot whereas drainage carries about 8 to 9 tons per acre foot. 4. Return flows from the district on an annual basis of about 240,000 acre feet appears abnormally high. The district is probably using more water than it needs to carry on agriculture satisfactorily. Further study shold be given to whether diversions and thus return flows could be reduced as one of the regulatory measures to reduce total flows in the river in winter to the 900 cubie second feet Mexico is required to take.Epson Perfection 4870 Photo, 400 dpi, 24 bit,1,210,770 byte