WSP03154

• File Number: 8510.100.60
• Description: Rio Grande Compact Commission
• Basin: Rio Grande
• Water Division: 3
• Date: 1/1/1950
• Title: Twelfth Annual Report of the Rio Grande Compact Commission 1950
• Water Supply Pro - Doc Type: Annual Report

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The equipment, method and frequency of measurements at each
gaging station shall be sufficient to obtain records at least equal
in accuracy to those classified as "good" by the U. S. Geological
Survey. Water stage recorders on the reservoirs specifically named
in Article II of the Compact shall have sufficient range below max-
imum reservoir level to record major fluctuations in storage. Staff
gages may be used to determine fluctuations below the range of the
water stage recorders on these and other large reservoirs, and staff
gages may be used upon approval of the Commission in lieu of water
stage recorders on small reservoirs, provided that the frequency of
observation is sufficient in eaoh case to establish any material
ohanges in water levels in such reservoirs.

RESERVOIR CAPACITIES f2.

Colorado shall file with the Commission a table of areas and
capacities for each reservoir in the Rio Grande Basin above Lobatos
oonstructed after 1937; New Mexico shall file with the Commission a
table of areas and capaoities for eaoh reservoir in the Rio Grande
Basin between Lobatosand San Maroial construoted.after 1929; and
Texas shall file with the Commission tables of areas and capacities
for Elephant Butte Reservoir and for all other reservoirs aotually
available for the storage of water between Elephant Butte and the
first diversion to lands under the Rio Grande Projeot.

Whenever it shall appear that any table of areas and capaoities
is in error by more than five per cent, the Commission shall use its
best efforts to have a re-survey made and a corrected table of areas
and oapacities to be substituted as soon as praotioable. To the end
that the Elephant Butte effective supply may be oomputed accurately,
the Commission shall use its best efforts to have the rate of aocumu-
lation and the place of deposition of silt in Elephant Butte Reser-
voir checked at least every three years.

ACTUAL SPILL L1

(a) Water releases from Elephant Butte in excess of Project re-
quirements, which is currently passed through Caballo Reservoir,
prior to the time of spill, shall be deemed to have been Usable Water
released in anticipation of spill, or Credit water if suoh release
shall have been authorized.

(b) Exoess releases from Elephant Butte Reservoir, as defined
in (a) above, shall be added to the quantity of water aotually in
storage in that reservoir, and Actual Spill shall be deemed to have

~ Amended at Eleventh Annual Meeting, February 23, 1950.

b Adopted at Fifth linnual Meeting, February 24, 1943.