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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
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USGS Water-Year Summary 2023
133032144491871 M-10A, Harmon Loop School, Dededo, Guam
Other aquifers
LOCATION - Lat 13°30'38.2", long -144°92'6.9" referenced to North American Datum of 1983, Guam County, GM, Hydrologic Unit 22010000, Located within campus of Juan M. Guerrero Elementary School, Dededo, near the boulevard and entrance into school parking lot.
REVISIONS HISTORY - Discrete water level on April 27, 2017 was approved with an incorrect date of April 26, 2017. Date was corrected on May 24, 2018 by hajeppes.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth undefined. Upper casing diameter undefined; top of first opening undefined, bottom of last opening undefined. Drilled basal water-table well, depth reported 288 ft, casing diameter 8 in.
DATUM - Land-surface datum is 228.62 ft above undefined vertical datum. Measuring point: top of steel casing, west-southwest side, 228.99 ft above Guam Vertical Datum of 2004, Feb. 17, 2006 to present. Water level elevations are referenced to the Guam Vertical Datum of 2004 (GUVD04) beginning February 17, 2006.
PERIOD OF RECORD - Water level recorder, January 1974 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 5.24 feet above mean sea level, September 21 and 22, 2013; lowest water level, 1.94 feet above mean sea level, February 10-12, 1983.
