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USGS 132626144471771 EX-4 Mangilao, Guam

  Well Site

DESCRIPTION:
Latitude 13°26'29.7",   Longitude -144°47'24.1"   NAD83
Guam, Guam   , Hydrologic Unit 22010000
Well depth: 390 feet
Hole depth: 400 feet
Land surface altitude: 153.49 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)    2010-08-15  2024-02-21  
 Daily Data
    Groundwater level above local mean sea level (LMSL), feet  2010-08-15  2011-01-13  152 
 Daily Statistics 
    Groundwater level above local mean sea level (LMSL), feet  2010-08-15  2011-01-13 152 
 Monthly Statistics 
    Groundwater level above local mean sea level (LMSL), feet  2010-08  2011-01  
 Annual Statistics 
    Groundwater level above local mean sea level (LMSL), feet  2010  2011  
 Field groundwater-level measurements 1981-03-17  2023-10-27  148 
 Field/Lab water-quality samples 1981-03-20  1996-01-31  222 
 Water-Year Summary 2010  2013  4 
 Revisions  Loading...

Additional Data Sources

Begin Date

End Date

Count
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.

weri Station operated in cooperation with the Water and Environmental Research Institute, University of Guam.