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The Northern Guam Lens Aquifer (NGLA) Database
Vivianna B. Bendixson, 2013, WERI UOG
WERI Technical Report 141 is the first report of the hydrogeologic studies trilogy in support of a USGS groundwater model of the NGLA. It describes the content and organization of the Northern Guam Lens Aquifer Database, a comprehensive centralized database containing information on custodianship, function, operational status, and the geographical, hydrological, engineering, and geological attributes of each ground drillings and installed wells in northern Guam for which records could be found.
The careful examination of drill logs organized in this database were used in determining the Basement Topography beneath the NGLA (TR 141), updating Mink’s earlier efforts, improving the mapping of groundwater, and suggesting delineation of manageable basin boundaries. Bendixson’s database concept was expanded to include the organization of production well salinity trends (TR 143, in revision).
A limited second edition was soon distributed with access to the digital product. It included a CD for accessing the database information. Now, this database is online.
The Borehole Database on Google Maps
USGS National Weather Information System: Mapper
Owner | Operator
Map Contents:
- Guam Hydrologic Survey
- Guam Environmental Protection Agency
- Guam Waterworks Authority
- Navy
- Air Force
- Private
- Unknown
Series | Group
Sub-Type
Map Contents:
- Data Collection
- Exploratory
- Observation | Monitoring
- Utility
- Drinking
- Industrial | Agricultural
- Stormwater Management
Year Drilled
USGS Data
Map Contents:
WERI BHDB USGS Links
- Guam Waterworks Authority
- Guam Hydrologic Survey
- US Air Force
- US Navy
- Private
- Unknown
- US Navy (GWA)
Aquifer Basins
- Agafa Gumas
- Andersen
- Finegayan
- Hagatna
- Mangilao
- Yigo-Tumon
GHS Monitoring Data
Map Contents:
- Water Level Only
- Deep Monitoring Wells Only
- Deep and Water Level Wells
- Ceased Observation
Proposed Monitoring Wells: (TBA)
Observation Wells Plus
Map Contents:
- Water Level Only
- Deep Monitoring Wells Only
- Deep and Water Level Wells
- Ceased Observation
Proposed deep monitoring eels, first choice proposed site area limit aquifer basins production well by Owner | Operator: (TBA)
Observation Wells Rehabilitation and New
Map Contents:
- Observation wells for rehabilitation – A-16, A-20, BPM-1, EX-1, EX-10, EX-4, EX-8, EX-9, Ghura-Dededo, M-10A, EX-6, NCS-3
- New deep observation wells – AAFB DW1, NW Field DW1, NCS Finagayan DW1, NCS Finagayan DW2, NCS Barrigada DW1, Marbo DW1, Yigo DW1
Borehole Inspection Downhole Videos
Map Contents:
- Guam Waterworks Authority Island-wide Well Site Rehabilitation Project
- Guam Waterworks Authority Downhole Video Collection
GWA Production Well Status
Map Contents:
- Active
- Out of Commission
- Grounded Motor
- Secured
- Standby
BHDB on Google Maps
- Guam Hydrologic Survey
- Guam Environmental Protection Agency
- Guam Waterworks Authority
- Navy
- Air Force
- Private
- Unknown
See Wells in Aquifer Basins on Google Maps >>
Map Contents:
- Agafa Gumas
- Andersen
- Finegayan
- Yigo-Tumon
- Mangilao
- Hagatna
See Well Sub-Types in Google Maps >>
Map Contents:
- Data Collection
- Exploratory
- Observation | Monitoring
- Utility
- Drinking
- Industrial | Agricultural
- Stormwater Management
- Active
- Inactive
- Offline
- Abandoned
- Unknown
- Guam Waterworks Authority
- Guam Hydrologic Survey
- US Air Force
- US Navy
- Private
- Unknown
- US Navy (GWA)
- Agafa Gumas
- Andersen
- Finegayan
- Hagatna
- Mangilao
- Yigo-Tumon
See all Monitoring Wells on Google Maps >>
Map Contents:
- Water Level Only
- Deep Monitoring Wells Only
- Deep and Water Level Wells
- Ceased Observation
Proposed Monitoring Wells: (TBA)
See Observation Wells Plus on Google Maps >>
Map Contents:
- Water Level Only
- Deep Monitoring Wells Only
- Deep and Water Level Wells
- Ceased Observation
Proposed deep monitoring eels, first choice proposed site area limit aquifer basins production well by Owner | Operator: (TBA)
See New and Rehabilitation Observation Wells on Google Maps >>
Map Contents:
- Observation wells for rehabilitation – A-16, A-20, BPM-1, EX-1, EX-10, EX-4, EX-8, EX-9, Ghura-Dededo, M-10A, EX-6, NCS-3
- New deep observation wells – AAFB DW1, NW Field DW1, NCS Finagayan DW1, NCS Finagayan DW2, NCS Barrigada DW1, Marbo DW1, Yigo DW1
Map Contents:
- Guam Waterworks Authority Island-wide Well Site Rehabilitation Project
- Guam Waterworks Authority Downhole Video Collection
- Active
- Out of Commission
- Grounded Motor
- Secured
- Standby