Borehole Database (BHDB)

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.

BHDB File Directory

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BHDB Excel Online

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The Borehole Database on Google Maps

USGS National Weather Information System: Mapper

Owner | Operator

Map Contents:

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

Map Contents:

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

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Type

Map Contents:

  1. Data Collection
  2. Utility
  3. Stormwater Management
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Sub-Type

Map Contents:

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

Map Contents:

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

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USGS Data

Map Contents:

WERI BHDB USGS Links

  1. Guam Waterworks Authority
  2. Guam Hydrologic Survey
  3. US Air Force
  4. US Navy
  5. Private
  6. Unknown
  7. US Navy (GWA) 

Aquifer Basins

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

Map Contents:

  1. Water Level Only
  2. Deep Monitoring Wells Only
  3. Deep and Water Level Wells
  4. Ceased Observation

Proposed Monitoring Wells: (TBA) 

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Observation Wells Plus

Map Contents:

  1. Water Level Only
  2. Deep Monitoring Wells Only
  3. Deep and Water Level Wells
  4. Ceased Observation

Proposed deep monitoring eels, first choice proposed site area limit aquifer basins production well by Owner | Operator: (TBA)

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Observation Wells Rehabilitation and New

Map 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
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Borehole Inspection Downhole Videos

Map Contents:

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

Map Contents:

  1. Active
  2. Out of Commission
  3. Grounded Motor
  4.  Secured
  5. Standby

 

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BHDB on Google Maps

View and interact with the map on the USGS website >> 

BHDB on ArcGIS Online