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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
16865000 Pago River near Ordot, Guam
LOCATION - Lat 13°26'12.5", long -144°52'1.7" referenced to North American Datum of 1983, Guam County, GM, Hydrologic Unit 22010000, (1:24,000 Agana Quadrangle, 1968) located 3.0 mi east of Mt Chachao, 0.4 mi southwest of Ordot-Chalan Pago School, and 2.7 mi southeast of US Naval Hospital.
DRAINAGE AREA - 5.57 mi². from automated delineation using 10-meter National Elevation Data set digital elevation model data dated September 2006 and Watershed Boundary Dataset dated May 2008, using UTM Zone 4 projection, NAD 83 horizontal datum.
REVISIONS HISTORY - WSP 1937: 1954 (M), 1958 (M), WSP 2137: Drainage Area. WDR HI-10-1: Drainage Area
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1951 to December 1982, September 1998 to current year. September 1998 to September 2005, unpublished records are in the files of the U.S. Geological Survey.
GAGE - Water stage recorder and concrete control. Altitude of gage is 25 ft (from topographic map). Prior to April 10, 1972, at datum 1.00 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 17,300 ft³/s, December 8, 2002, gage height, 23.85 ft, from flood marks and rating curve
extended above 320 ft³/s on basis of slope-area measurements at gage heights 13.22 ft, 15.07 ft, 18.87 ft, and 20.06 ft; minimum, no flow for many
days
