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<br />RIO GRANDE COMPACT COMMISSION REPORT
<br />
<br />ACCURACY OF RECORDS
<br />
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<br />
<br />The Rules and Regulations of the Commission state that the equipment,
<br />method, and frequency of measurement at each gaging station shall be
<br />sufficient to obtain records at least equal in accuracy to those classified
<br />as "good" by the U.S, Geological Survey. Within the physical limitations
<br />of stream gaging, the agencies obtaining the records at Compact gaging stations
<br />have complied with these regulations.
<br />
<br />The station description states the degree of accuracy of the records.
<br />ItExcellentll indicates that, in general, the error in the daily records is
<br />believed to be less than 5 percent; "good" less than 10 percent; "fair'! less
<br />than 15 percent; and "poor I! probably more than 15 percent. The records of
<br />monthly runoff are, in general, more accurate than the daily records. These
<br />standards of accuracy are the same as those followed by the U. S. Geological
<br />Survey.
<br />
<br />ERRATA
<br />
<br />The minutes of the Sixth Annual (Sixteen) Meeting of the Rio Grande
<br />Compact Commission state in part:
<br />
<br />"--factual data used in the compilation of
<br />reports of the Commission which factual data
<br />had been revised and published by the D,S.G.S.
<br />----subsequent to use by the Compact
<br />Commission in computing debits and credits
<br />should be published in succeeding reports of
<br />the Commission together with proper explanatory
<br />notes."
<br />
<br />The Rio Grande Compact provides that the Annual Report of the CorTlluission
<br />for each calendar year shall be transmitted to the Governors of the signatory
<br />states before March first of the following year. Although every effort is
<br />made to furnish correct data to the Commission for use in their report, the
<br />limited time available to the collecting agency does not permit a thorough
<br />analysis of the data and they are necessarily subject to revision.
<br />
<br />The Commission.-bases all computations of debits and credits on volumes
<br />in thousands of acre-feet, expressed to the nearest hundred. A check was
<br />made of all records published in these annual reports against those published
<br />by the U.S.G.S. and it was found that in most instances the changes were not
<br />of sufficient magnitude to affect the computations of debits and credits;
<br />other changes were of items not used by the Commission; but whenever a
<br />corrected value affected the computations of credits or debits, such revisions
<br />have been published. The effect of changes or revisions on the credits,
<br />debits or departures from normal release have been adjusted from time to time
<br />by appropriate correction entries.
<br />
<br />The figures shown below are the corrected values of runoff in acre-feet
<br />for the period March to December 1971,
<br />
<br /> Azotea tunnel at Outlet, Willow Creek above Heron Reservoir
<br /> near Chama, N, Mex. near Chama, N. Mex.
<br />March 615
<br />April 10,93G 10,790
<br />.May 13,19G 13,280
<br />June 20,960 21,290
<br />July 4,200 4,690
<br />August 3,470 3,930
<br />September 928 1,260
<br />October 2,570 2,930
<br />November 2,470 2,720
<br />December 654 730
<br />Calendar year 1971 59,980 63,420
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