Borehole Database (BHDB)

The Northern Guam Lens Aquifer (NGLA) Database – Vivianna M. 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.

BHDB File DirectoryVB BHDB Excel Online

 

BHDB Maps

USGS National Water Information System: Mapper

BHDB on Google Maps

See well Owner|Operator on Google Maps >>

  1. Guam Hydrologic Survey
  2. Guam Environmental Protection Agency
  3. Guam Waterworks Authority
  4. Navy
  5. Air Force
  6. Private
  7. Unknown

See wells in aquifer basins on Google Maps >>

  1. Agafa Gumas
  2. Andersen
  3. Finegayan
  4. Yigo-Tumon
  5. Mangilao
  6. Hagatna

See well types in Google Maps >>

  1. Data Collection
  2. Utility
  3. Stormwater Management

See well sub-types in Google Maps >>

  1. Data Collection
    1. Exploratory
    2. Observation|Monitoring
  2. Utility
    1. Drinking
    2. Industrial|Agricultural
  3. Stormwater Management

See well status on Google Maps >>

  1. Active
  2. Inactive
  3. Offline
  4. Abandoned
  5. Unknown

See all monitoring wells on Google Maps >>

Contents:

  1. Water level only
  2. Deep monitoring wells only
  3. Deep and water level wells
  4. Ceased Observation

Proposed monitoring wells

See observation wells plus on Google Maps >>

Contents:

  1. Water level only
  2. Deep monitoring wells only
  3. Deep and water level wells
  4. Ceased Observation

Proposed deep monitoring wells, first choice
Proposed site area limit
Aquifer basins
Production well by owner|operator

See new and rehabilitation observation wells on Google Maps >>

Contents:

  1. 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
  2. New deep observation wells – AAFB DW1, NW Field DW1, NCS Finagayan DW1, NCS Finagayan DW2, NCS Barrigada DW1, Marbo DW1, Yigo DW1

See borehole inspection downhole video sites and links on Google Maps >>
See borehole inspection downhole video playlist on YouTube >>

Contents:

  1. Guam Waterworks Authority Island-wide Well Site Rehabilitation Project
  2. Guam Waterworks Authority Downhole Video Collection

See Production Well Operations Status on Google Maps >>

Contents:

  1. Active
  2. Out of commission
  3. Grounded motor
  4. Secured
  5. Standby

BHDB on ArcGIS Online