- DESCRIPTION:
-
Latitude 13°28'16.9", Longitude -144°47'33.1" NAD83
Guam, Guam , Hydrologic Unit 22010000 - Well depth: 229 feet
Hole depth: 229 feet
Land surface altitude: 207.44 feet above GUVD04.
Well completed in "Other aquifers" (N9999OTHER) national aquifer.
Well completed in "Limestone" (100LMSN) local aquifer
- AVAILABLE DATA:
Data Type Begin Date End Date Count Current / Historical Observations (availability statement) 2007-10-01 2024-11-25 Daily Data Groundwater level above local mean sea level (LMSL), feet 1975-04-01 2008-02-14 10066 Groundwater level above Guam Vertical Datum of 2004, feet 2008-03-08 2024-11-24 4910 Daily Statistics Groundwater level above local mean sea level (LMSL), feet 1975-04-01 2008-02-14 10066 Groundwater level above Guam Vertical Datum of 2004, feet 2008-03-08 2020-01-14 3986 Monthly Statistics Groundwater level above local mean sea level (LMSL), feet 1975-04 2008-02 Groundwater level above Guam Vertical Datum of 2004, feet 2008-03 2020-01 Annual Statistics Groundwater level above local mean sea level (LMSL), feet 1975 2008 Groundwater level above Guam Vertical Datum of 2004, feet 2008 2020 Field groundwater-level measurements 1980-03-03 2024-07-15 301 Water-Year Summary 2007 2020 14 Revisions Loading...
- OPERATION:
- Record for this site is maintained by the USGS Pacific Islands Water Science Center
- Email questions about this site to Pacific Islands Water Science Center Water-Data Inquiries
- ADDITIONAL INFORMATION
For this site, "Field groundwater-level measurements" displayed in "Table of data" or "Tab-separated data" formats indicate water levels above two different vertical datums for each measurement date and time, although only one of the datums currently is appropriate and accurate for the measurement. In general, the appropriate vertical datum is date dependent. The appropriate datum for water levels measured before about 2005 to 2010 is LMSL (local mean sea level), whereas the appropriate datum for water levels measured after about 2005 to 2010 is the most current vertical datum available (GUVD04 for Guam; NMVD03 for Saipan). The dates that are appropriate for each datum are site specific and have yet to be determined for this site. Also, the vertical datum indicated in the graphical output of "Field groundwater-level measurements" may reflect an incorrect datum, depending on the range of dates being displayed.
Station operated in cooperation with the Water and Environmental Research Institute, University of Guam.
