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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 2025
215950159231601 2-5923-08, Hanamaulu monitor well, Kauai, HI
Hawaii volcanic-rock aquifers
Koloa Volcanic Series, Lava Flows
Koloa Volcanic Series, Lava Flows
LOCATION - Lat 21°59'40.1", long 159°23'07.6" referenced to North American Datum of 1983, Kauai County, HI, Hydrologic Unit 20070000, 1.5 miles northwest of Lihue, and 2.8 miles west of the nearest shoreline.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 1,002 ft. Upper casing diameter 4 in; top of first opening 87 ft, bottom of last opening 1,002 ft. /--Drilled well, depth 1,002 feet, 12.75-inch solid steel outer casing: 0-124 feet; 4-inch solid pvc casing: 0-87 feet; 4-inch perforated pvc casing: 87 feet to bottom; annular space grouted: 0-124 feet; annular space gravel packed: 124 feet to bottom.
DATUM - Land-surface datum is 272.55 ft above undefined vertical datum. Measuring point: top of 4-inch aluminum well cap bracket, 273.49 ft above Local Mean Sea Level, Sep. 5, 1995 to Apr. 4, 2010; top of 4-inch aluminum well cap bracket, 273.48 ft above Local Mean Sea Level, Jan. 4, 2010 to present. is the top of 4-inch well casing, 273.48 feet above mean sea level.
PERIOD OF RECORD - Water-level recorder, February 1996 to September 30, 2009. Initial water-level measurement October 5, 1995. Water-level measurements October 15, 1999 to May 17, 2011, November 19, 2018 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 244.14 feet above mean sea level, April 10, 1997; lowest water level measured, 204.37 feet above mean sea level, January 20, 21, 1998.
