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<br />RIO GRANDE COMPACT COMMlSStON REPORT
<br />EV APORAnON AND PRECIPrr A nON
<br />
<br />The last paragraph of Article VI of the Compact states, in part, - "such credits and debits shall be reduced annually to compensate
<br />for evaporation losses in the proportion that such credits or debits bear to the total amount of water in such reservoirs during the year."
<br />
<br />To provide the data needed for the computation of such evaporation losses, the Commission has encouraged the establishment and
<br />operation of evaporation stations near each major reservoir in the basin and at other selected locations.
<br />
<br />Evaporation and other climatological data collected at the several stations in Colorado and New Mexico are tabulated'on the next
<br />page. A t some of the stations, it was not possible to obtain evaporation records throughout the winter period.
<br />
<br />The measurements of evaporation were made In accordance with standard practice for the type of pan in use. Measurements of
<br />precipitation were mc:de in standard 8-inch rain gages, which were supplemented at some of the stations by recording rain gages.
<br />
<br />Records for the evaporation stations at the State University, Elephant Butte Dam, and EI Vado Dam antedated the creation of the
<br />Commission; the stations at Abiquiu Dam, Cochiti Dam, and Jemez Canyon Dam were established by the Corps of Engineers. All
<br />others were esfablished at the request of the Commission.
<br />
<br />The Rio Grande Compact Commission gratefully acknowledges the cooperation of the National Oceanic and Atmospheric
<br />Administration, U.S. Army Corps of Engineers, and US. Bureau of Reclamation for furnishing the climatological records contained in
<br />this report.
<br />
<br />Alamosa Airport.-Lat 37027', long 105052', in Alamosa County at airport near Alamosa, Colo. Standard class A pan, anemometer,
<br />maximum and minimum thermometers, standard s..inch and recording rain gages at elevation 7.536 ft.
<br />
<br />Platoro Dam.--Lat 37021', long 106030', in Conejos County near Platoro, Colo. Standard class A pan, anemometer, maximum and
<br />minimum thermometers, fan type psychrometer, standard S-lnch and recording rain gages at elevation 9,826 ft.
<br />
<br />Heron Dam.--Lat 36040', long 106042', in Rio Aniba County about 4 mi. northeast of Heron Dam near Tierra Amarilla, N. Mex.
<br />Standard class A pan, maximum and minimum thennometers, and standard s..inch rain gage at elevation 7,310 ft.
<br />
<br />EI Vado Dam.-Lat 36036', long 106044', in Rio Arriba County at El Vado Dam near Tierra Amarilla, N. Mex. Standard class A pan,
<br />anemometer, maximum and minimum thermometers, standard 8-inch and recording rain gages at elevation 6,750 ft.
<br />
<br />Abiaulu Dam...Lat 36014', long 106026', in Rio Arriba County at Abiquiu Dam near Abiquiu, N. Mex. Standard class A pan, maximum
<br />and minimum thermometers, standard 8-inch and recording rain gages at elevation 6,380 f1.
<br />
<br />Nambe Falls Dam.-Lat 35051', long 105054', in Santa Fe County at Nambe Falls Dam, N. Mex. Standard class A pan, maximum and
<br />minimum thermometers, recording thermograph, standard,8-inch and recording rain gages at elevation 6,840 ft.
<br />
<br />Cochiti Dam.--Lat 35038', long 106019', in Sandoval County at operations building. at Cochiti Dam, N. Mex. Standard class A pan,
<br />anemometer, maximum and minimum thermometers, standard 8-inch and recording rain gages at elevation 5,560 ft.
<br />
<br />lemez Canyon Dam.-Lat 35023', long 106032', in Sandoval County atJemezCanyon Dam, N. Mex. Standard class A pan, anemometer,
<br />maximum and minimum thennometers, standard a-inch and recording rain gages at elevation 5,388 ft.
<br />
<br />Eleohant Butte Dam.-Lat 33009', long 107011', In Sierra County at Elephant Butte Dam, N. Mex. Standard class A paf.1, anemometer,
<br />maximum and minimum thermometers, and standard 8-lnch rain gage at elevation 4,576 ft.
<br />
<br />Caballo Dam..-Lat 32054', long I07DJ8', in Sierra County at CabalJo Dam, N. Mex. Standard class A pan, anemometer, maximum and
<br />minimum thermometers, standard s..inch and recording rain gages at elevation 4,190 ft.
<br />
<br />New Mexico State University.--Lat 32017', long 106045', In Dotia Ana County at U~lversity Park, N. Mex. Standard class A pan,
<br />. anemometer, maximum and minimum thennometers, standard S-inch and recording rain gages at elevation 3,88J ft.
<br />
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