Rio Grande Compact (1938)

+ This compact entered into by the States of Colorado, New Mexico, and Texas, with consent of the United States Congress apportions the waters of the Rio Grande Basin.

+ Colorado's commitment to deliver water at the New Mexico state line is based on runoff measured at four index stations located in the headwaters area.

+ The compact provides schedules of required deliveries, for accrual of debits and credits in deliveries and control of storage under certain circumstances.

+ Project storage is the combined capacity of Elephant Butte and Caballo Reservoirs.

+ In the event that works are constructed after 1937 for the purpose of delivering water into the Rio Grande from the Closed Basin, Colorado shall not be credited with the amount of such water delivered, unless the proportion of sodium ions shall be less than 45 percent of the total positive ions in that water when the total dissolved solids in such water exceeds 350 parts per million.

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