WSP00265

• File Number: 8510.100.60
• Description: Rio Grande Compact Commission
• Basin: Rio Grande
• Water Division: 3
• Date: 1/1/1941
• Title: Third Annual Report of the Rio Grande Compact Commission 1941
• Water Supply Pro - Doc Type: Annual Report

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the Rio Grande below those reservoirs shall be equipped
maintained and operated by or on behalf of Texas through
the agency of the U. S. Bureau of Reclamation.

The equipment, method and frequency of measure-
ments 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 re-
corders on the reservoirs specifically named in Article II
of the Compact shall have sufficient range below maxi-
mum reservoir level to record major fluctuations in stor-
age. 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 record-
ers on small reservoirs, provided that the frequency of ob-
servations is sufficient in each case to establish any ma-
terial changes in water levels in such reservoirs.

Reservoir Capacities

Colorado shall file with the Commission a table of
areas and capacities for each reservoir in the Rio Grande
Basin above Lobatos constructed after 1937; New Mexico
shall file with the Commission a table of areas and capac-
ities for each reservoir in .the Rio Grande Basin between
Lobatos and San Marcial constructed after 1929; and
Texas shall file with the Commission tables of areas and
capacities for Elephant Butte Reservoir and for all other
reservoirs actually available for the .storage of water be-
tween Elephant Butte and the first diversion to lands un-
der the Rio Grande Project.

Whenever it shall appear that any table of areas and
capacities is in error by more than five percent, the Com-
mission shall use its best efforts to have a re-survey made
and a corrected table of areas and capacities to be substi-
tuted as soon as practicable. To the end that the records
of flow of the Rio Grande at San Marcial, at San Acacia,
and below Elephant Butte Reservoir may be correlated,
the Commission shall use its best efforts to have the rate
of accumulation and the place of deposition of silt in
Elephant Butte Reservoir checked at least every three
years.

Evaporation Lo&ses

The Commission shall encourage the equipping,
maintenance and operation, in cooperation with the United
States Weather Bureau or other appropriate agency, of
evaporation stations at Elephant Butte Reservoir and at or
near each major reservoir in the Rio Grande Basin within
Colorado constructed after 1937 and in New Mexico con-

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