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.