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'; . . 0, , "1 C C'i this reach of the river. As instantaneous flows were not obtained with the samples, averaee daily flows were used to compute the salt load shO'.'l1 in Table 2. Water is diverted downstream from the well to irrigate about lO,OOO acres between the well and the below-),leeker gage during the irri- gat ion season. ~le well on Piceance Creek contributed about half an acre-foot of l1,800 parts per million water (over 13 tons of salt) per day to Piceance Creek and thcn to the ,fuite River. Table 5 shows the analysis of three samples obtained by the Bureau of Reclamation and one sample obtained by rtITCA. The flow of 0.53 se~ond-foot for the August 5, 1968, sample was the result of activit;r of the contractor at' the "Well increasing the flml by re- moving the valve. The flows "Were measured by the Bureau of Reclamation by timing the filling of a bucket at the point of di.scharge into Piceance Crr>ek. AccordinG to the chemical analysis, about 46 percent of the mineral was sodium and 53 percent was bicarbonate. The other minerals accounted for less than 1 percent. Prior quality records for Piceance Creek were insuffi- cient to determine the' creek's annual salinity load and the proportion,s.te part contributed by the "Well. At low creek flows of lO second-feet or less, however, the "Well probably contributed over 25 percent of the salinity l02d, The alillual contribution of 62,500 tons of salt by the Hecker and Pice- ance Creek wells ....as about 19 percent of the annual salinity load contrib- uted by the Hhite River to the Colo'rado River system. A reduction of 62,500 tons of salt per year from the Hhite River will reduce the salinity concentration below !roo.ler Da;n by about 4.3 parts per million for present conditions and 5.1 parte pel". mi!b_ic!:'JOl'. future_conditions of '.rater use. -- - - 4