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<br />RIO GRANDE COMPACT COMMISSION REPORT
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<br />EVAPORATION AND PRECIPITATION
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<br />\,,_ The last paragraph of Article VI of the Compact states, in part. --- "such credits and
<br />debits shall be reduced annually to compensate for evaporation losses 1n the proportion that
<br />such credits or debits bear to the total amount of water in such reservoirs during the year.ll
<br />To provide the data needed for the computation of such evaporation losses, the Commission
<br />has encouraged the establishment and operation of evaporation stations near each major reservoir
<br />in the basin and at other selected locations. ;~
<br />
<br />Evaporation and other climatological data collected at the several stations in Colorado
<br />and New Mexico are tabulated on the next page. At some of the stations, it was not possible to
<br />obtain evaporation records throughout the winter period.
<br />
<br />The measurements of evaporation were made in accordance with standard practice for the
<br />type of pan in use. Measurements or precipitation were made in standard 8-inch rain gages.
<br />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
<br />El Vade Dam antedated the creation of the Commission; the station at Bosque del Apache was
<br />established for the U.S. Fish and Wildlife Service; the stations at Abiquiu Darn. Cochiti Dam,
<br />and Jemez Canyon Dam were established by the corps of Engineers. All others were established
<br />at the request of the Commission.
<br />
<br />The Rio Grande Compact Commission gratefully acknowledges the cooperation of the U. ~.
<br />Environnental Science Services Administration, U.S. Corps of Engineers. and U.S. Bureau of
<br />Reclamation for furnishing the climatological records contained in this report.
<br />
<br />Wa~on Wheel Gap.--Lat 37046', long 106049', in Mineral County near Creede, Colo. Standard
<br />class A pan, ane~ometer, maximum and minimum thermometers, standard 8-inch and recording
<br />rain gages at elevation 8,500 ft.
<br />Alarnosa Airport.--Lat 37027', long 105052". in Alamosa County at airport near Alamosa, Cclo.
<br />Standard class A pan, anemometer, maximum and minimum thermometers, standard 8-1nch and
<br />recording rain g2ges at elevation 7,536 ft.
<br />Platoro Dam.--Lat 370211, long 106030'. in Conejos County near Platoro, Colo. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, fan type psychrometer, standard
<br />8-inch and recording rain gages at elevation 9,826 ft. Records furnished by Bureau of
<br />Heclamation.
<br />
<br />E1 Vado Dam.--Lat 36036', long 10604~1, in Rio Arriba County at El Vado Daffi near Tierra
<br />Arrarilla, K. Mex. Standard class A pan, anemometer, maximum and minimum thermometers,
<br />standard 8-inch and recording rain gages at elevat10n 6,750 ft.
<br />Abiquiu Dam.--Lat 360141, long 106026', in Rio Arriba County at Abiquiu Dan near Abiquiu,
<br />N. Mex. Standard class A pan, rraximum and minimum thermometers, standard a-inch and
<br />recording rain gages at elevation 6,380 ft.
<br />Santa Fe Col1ep:e.--Lat 35039', long 105058', in Santa Fe, J.l. Mex. Standard class A pan,
<br />anemometer, maximum and minimum thermometers, standard a-inch and recording rain gageE
<br />at elevation 6,800 ft.
<br />
<br />Cochiti Dam.--Lat 35038", long 106019", in Sandoval County at operations building, at Cochiti
<br />Damsite, N. Mex. Standard class A pan, anemometer, maximum and minimum thermometers,
<br />standard 8-inch and recording rain gages at elevation 5.560 ft.
<br />
<br />Jemez Dam.--Lat 35~23', long 106032", in Sandoval County at Jemez Dam, N. Mex. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, standard 8-inch and recording rain
<br />gages at elevation 5,388 ft.
<br />Bosque del Apache.--Lat 33~46", long 106054', in Socorro County, 7 miles south or San Antonio.
<br />N. Mex. Standard class A panJ anemometer, maximum and minimum thermometers, standard 8-inch
<br />and recording rain gages at elevation 4,520 ft.
<br />Elephant Butte Dam.--Lat 33~09', long 1070111, in Sierra County at Elephant Butte Dam, K. Mex.
<br />Standard class A pan, anemometer, maximum and mimimum thermometers, and standard 8-inch
<br />rain gage at elevation 4,576 ft.
<br />Caballo Dam.--Lat 320541, long 107018', in Sierra County at Caballo Dam, N. Mex. Standard class
<br />A pan, anemometer. maximum and minimum thermometers, standard 8-inch and recording rain gages
<br />at elevation 4,190 ft.
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<br />New ~exico State University.--Lat 32~171, long 106045', in Dona Ana County at University
<br />N. Mex. Standard class A pan, anemometer~ maximum and minimum thermometers, standard
<br />and recording rain gages at elevation 3.8~1 ft.
<br />
<br />Park.
<br />8-inch
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