53 STAT.] 76TH CONG. , 1ST SESS.-CH. 155 -MAY 31, 1939 Such gaging stations shall be equipped, maintained, and operated by the Commission directly or in cooperation with an appropriate Federal or State agency, and the equipment, method and frequency of measurement at such stations shall be such as to produce reliable records at all times. ARTICLE III. The obligation of Colorado to deliver water in the Rio Grande at the Colorado-New Mexico State Line, measured at or near Lobatos, in each calendar year, shall be ten thousand acre feet less than the sum of those quantities set forth in the two following tabulations of relationship, which correspond to the quantities at the upper index stations: DISCHARGE OF CONEJOS RIVER Quantities in Thousands of Acre Feet Conejos Index Conejos River Conejos Index Conejos River Supply (1) at Mouths (2) Supply (1) at Mouths (2) 100 0 450 232 150 20 500 278 200 45 550 326 250 75 600 376 300 109 650 426 350 147 700 476 400 188 Intermediate quantities shall be computed by proportional parts. (1) Conejos Index Supply is the natural flow of Conejos River at the U. S . G . S . gaging station near Mogote during the calendar year, plus the natural flow of Los Pinos River at the U. S . G. S. gaging station near Ortiz and the natural flow of San Antonio River at the U. S. G. S . gaging station at Ortiz, both during the months of April to October, inclusive. (2) Conejos River at Mouths is the combined discharge of branches of this river at the U. S . G. S . gaging stations near Los Sauces during the calendar year. DISCHARGE OF RIO GRANDE EXCLUSIVE OF CONEJOS RIVER Quantities in Thousands of Acre Feet Rio Grande at Lobatos Rio Grande at Lo Rio Grande at Del less Conejos at Rio Orande at Del less Conejos Norte (3) Mouths (4) Norte (3) Mouths (41 200 60 750 229 250 65 800 257 300 75 850 292 350 86 900 335 400 98 950 380 450 112 1000 430 500 127 1100 540 550 144 1200 640 600 162 1300 740 650 182 1400 840 700 204 Intermediate quantities shall be computed by proportional parts. hatos at (3) Rio Grande at Del Norte is the recorded flow of the Rio Grande at the U. S. G. S . gaging station near Del Norte during the calendar year (measured above all principal points of diversion to San Luis Valley) corrected for the operation of reservoirs constructed after 1937. (4) Rio Grande at Lobatos less Conejos at Mouths is the total flow of the Rio Grande at the U.S.G.S. ngaing stations near Lobatos, less the discharge of Conejos River at its Mouths, during the Calendar year. 787
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