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USGS Water-Year Summary 2024
132813144472771 A-16, Barrigada, Guam
Other aquifers
Limestone
Limestone
LOCATION - Lat 13°28'16.9", long -144°73'3.1" referenced to North American Datum of 1983, Guam County, GM, Hydrologic Unit 22010000, at Carbullido School, 0.6 mi west of junction of Routes 8 and 10, Barrigada.
REVISIONS HISTORY - Water Level on April 26, 2017 was approved with an incorrect time of 1504. The time was corrected to 1704 on May 22, 2018 by HAJ.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 229 ft. Upper casing diameter undefined; top of first opening undefined, bottom of last opening undefined. Drilled basal water-table well, depth reported 215 ft, diameter 12 in.
DATUM - Land-surface datum is 207.73 ft above undefined vertical datum. Measuring point: top of steel casing, west side, near door, 207.72 ft above Guam Vertical Datum of 2004, May 30, 2008 to present. Previous measuring point altitude: 208.00 feet above mean sea level. Water level elevations are referenced to the Guam Vertical Datum of 2004 (GUVD04) beginning March 6, 2008.
PERIOD OF RECORD - Water level: June 1974 to current year.
PERIOD OF DAILY RECORD - April 1975 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level: 8.51 ft above mean sea level, May 28, 2004; Lowest water level: 2.83 ft above mean sea level, February 11 & 12, 1983.
