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mation to the computer. Personnel in ALB office will access the data for analy- sis and run the various operation models. The Water Quality Lab would remain in Alamosa, Colorado, and these personnel would provide on-site monitoring of operations ana water quality. The project water qual i ty and control for compl iance to the authorizing legislation, Rio Grande Compact, and Colorado Water Quality Standards are all areas that involve interstate and international concerns and, therefore, these functions will remain the responsibil ity of Reclamation. (1) Water Quality Requirements The Rio Grande Compact requires in Article III that Colorado shall not be credited with the amount of such water delivered from the Closed Basin Oivi sion unless the proportion of sodium ions shall be less than forty- five percent of the total positive ions in that water when the total dissolved solids in such water exceeds three hundred fifty parts per million. Reclamation has a certified water quality laboratory housed in the project office in Alamosa. The lab is staffed with a certified water che- mist and this position remains the responsibility of Reclamation. Individual well histories have been developed concerning quality and quantity data along wi th other perti nent mai ntenance information. These histories are updated on regular intervals and these data were used to develop a flow mixing model which will be utilized to provide the desired quality/quantity at the delivery points of the project. Compliance with the Rio Grande Compact water quality requirements are determined by measurements made at the Parshall flume. These data are used to analyze the volume of water delivered that meets the Rio Grande Compact criteria. c ,~ ;~~ ~1 ,,: ,0'4 15