D.U.M.B. DATABASE — FACILITY RECORD FORM DB-UF-001 · REV. 2026.03
UNDERGROUND FACILITIES DATABASE — USA
RECORD ID: UF-USA-0001 · deepundergroundmilitarybases.com/database/underground-facilities/usa/greenbrier/
CONFIRMED
BLOCK 1 — FACILITY IDENTIFICATION
Official Designation
Project Greek Island
Common Name
The Greenbrier Bunker
Operational Status
Decommissioned
Aliases / Also Known As
Greenbrier Congressional Shelter · The Bunker · White Sulphur Springs Facility
Country
United States of America
Region / State
West Virginia
Nearest City
White Sulphur Springs
Year Built
1958 – 1961
Era of Operation
1961 – 1992
Ownership
US Federal Government — operated by FEMA
Controlling Agency
FEMA / Army Corps of Engineers (construction)
Primary Contractor
Classified at build — USACE managed construction
Confidence Grade
CONFIRMED
UNVERIFIED 1958–1992 CORROBORATED 1992 CONFIRMED 1995–present ←
BLOCK 2 — EXECUTIVE SUMMARY

The Greenbrier Bunker — officially designated Project Greek Island — was a top-secret Continuity of Government facility constructed beneath the Greenbrier Resort in White Sulphur Springs, West Virginia between 1958 and 1961. For 34 years it served as the designated emergency relocation site for the United States Congress in the event of a nuclear attack.

The facility remained operational and classified until May 31, 1992, when investigative journalist Ted Gup published a detailed exposé in The Washington Post. The disclosure immediately triggered decommissioning. The bunker was declassified, opened to public tours in 1995, and stands today as one of the most thoroughly documented Cold War continuity of government facilities in the public record.

This record is graded CONFIRMED. The facility has been officially acknowledged by the US government, physically verified, and is now a registered historic site with extensive public documentation including architectural plans, government contracts, and congressional records.

BLOCK 3 — TECHNICAL INFOBOX
Facility Size
112,000 sq ft
Depth Below Surface
720 ft (approx.)
Blast Hardening
25-ton blast doors
Personnel Capacity
1,100 persons
Original Construction Cost (Taxpayer)
$14,000,000 (1958 USD)
Inflation-Adjusted Cost (2024)
≈ $152,000,000
Geology
Limestone karst
Engineering Plans
USACE Plans — NARA RG319
BLOCK 4 — STRATEGIC FUNCTION & CONTINUITY DESIGNATION
Original Purpose
Congressional relocation — Continuity of Government
Current Purpose
Decommissioned — public museum and historic site
Continuity Designation
LEGISLATIVE BRANCH — COG
Documented Access (Public Record)
All 535 members of Congress + designated staff. Source: Project Greek Island archives, declassified 1995.
COG Source Documentation
Federal Register · FEMA P-series · Project Greek Island archives (declassified 1995)
BLOCK 5 — ENGINEERING & GEOSPATIAL DATA
Coordinates
DECIMAL
37.7849° N, 80.3098° W
DMS
37°47'6"N 80°18'35"W
GOOGLE EARTH
37.7849, -80.3098
Site Description
Constructed within limestone karst terrain beneath The Greenbrier resort. Construction was disguised as a hotel exhibition hall renovation. The Army Corps of Engineers managed construction through a series of classified contracts. The 112,000 sq ft bunker is equipped with independent power, water, and communications systems capable of sustaining 1,100 persons for extended periods.
BLOCK 6 — HISTORICAL NARRATIVE & DECLASSIFICATION TIMELINE
1958
Construction begins — disguised as Greenbrier hotel renovation. Classified under Project Greek Island.
SOURCE: USACE Declassified Construction Records
1961
Facility declared operational. Designated primary Congressional COG relocation site under FEMA framework. Capacity: 1,100 personnel.
1992 ★
DECLASSIFICATION EVENT: Ted Gup publishes exposé — The Washington Post, May 31, 1992. US government confirms existence. Facility immediately decommissioned.
SOURCE: The Washington Post, May 31, 1992
1995 ★
DECLASSIFICATION EVENT: Bunker opens to public tours. Architectural plans and construction records released through National Archives. Confidence grade upgraded to CONFIRMED.
SOURCE: National Archives / The Greenbrier Resort
2026
Record published in D.U.M.B. Database as anchor facility for USA — Underground Facilities.
BLOCK 7 — EVIDENCE & DOCUMENTATION
PUBLIC DOMAIN IMAGERY
GOVERNMENT / PUBLIC DOMAIN
IMAGERY — SOURCE ATTRIBUTED
USACE / DoD / NARA
VIDEO DOCUMENTATION
No video documentation currently indexed for this facility.
External media provided for historical context only. Site does not host original video files.
DOCUMENTS
DECLASSIFIED Project Greek Island — Construction Contracts 1958–1961 PDF
Source: National Archives · Record Group 319
DECLASSIFIED USACE Engineering Reports — Project Greek Island PDF
Source: USACE Historical Division · Declassified 1995
FOIA RELEASED FEMA COG Designation Records — Greek Island PDF
Source: FEMA FOIA Reading Room · Released 2003
PUBLISHED REPORT "The Greenbrier's Secret" — Ted Gup, Washington Post LINK
Source: May 31, 1992 · Primary exposure article
BLOCK 8 — POLITICAL ACCOUNTABILITY & TAXPAYER RECORD
CONGRESSIONAL OVERSIGHT
Senate Armed Services Committee · House Appropriations Defense Subcommittee
CONSTRUCTION COST
$14M (1958) · ≈ $152M in 2024 dollars
Search USASpending.gov →
CONTRACTOR RECORDS
Classified at build — USACE managed construction
Search SAM.gov →
ANNUAL BUDGET LINE
Appropriated under classified line items — not publicly disclosed
RECENT ACTIVITY
Historic site status confirmed — no active congressional appropriations. Last referenced in Senate Armed Services Committee hearings 1995.
BLOCK 9 — EVIDENCE EVALUATION & GRADING RATIONALE
CONFIRMED — GRADING RATIONALE
This facility is graded CONFIRMED because the US government has officially acknowledged its existence, construction records are publicly available through the National Archives (Record Group 319), architectural plans have been released, and the facility is a registered historic site open to public inspection. No classified information is required to verify this record.
Sources Confirming This Grade
National Archives Record Group 319 · USACE Engineering Reports · FEMA FOIA Records 2003 · Washington Post May 31 1992
What Remains Unverified
Precise depth figure has not been officially confirmed in declassified records — 720ft is from museum published materials only.
What Would Change This Grade
This record cannot be downgraded absent evidence of deliberate falsification of National Archives construction records or official government retraction. The physical facility is open to public inspection.
Confidence Grade History
UNVERIFIED 1958–1992 CORROBORATED 1992 CONFIRMED 1995–present ←
BLOCK 10 — SATELLITE IMAGERY
SATELLITE VIEW — HISTORICAL / MUSEUM SITE 37.7849, -80.3098 · White Sulphur Springs, WV SOURCE: USGS EARTH EXPLORER — PUBLIC DOMAIN ANNOTATIONS: MAIN ENTRANCE · VENTILATION STRUCTURES · RESORT COVER FACILITY
NOTE: Satellite imagery sourced exclusively from public domain providers. Active facilities shown at generalized coordinates only. This is a decommissioned museum site — precise imagery is permitted.
BLOCK 11 — CITATIONS & BIBLIOGRAPHY
[1]
Gup, T. (1992, May 31). The Greenbrier's Secret. The Washington Post. Primary exposure article.
[2]
National Archives and Records Administration. (1995). Project Greek Island — Construction Contracts 1958–1961. Record Group 319. NARA. Washington D.C.
[3]
US Army Corps of Engineers. (1995). Engineering Reports — Project Greek Island. USACE Historical Division. Declassified 1995.
[4]
Federal Emergency Management Agency. (2003). COG Designation Records — Project Greek Island. FEMA FOIA Reading Room. Released 2003.
[5]
The Greenbrier Resort. (2026). Bunker Tour — Historical Record and Site Documentation. Public museum records. greenbrier.com
BLOCK 12 — CITE THIS RECORD
APA MLA CHICAGO PLAIN
D.U.M.B. Database. (2026). The Greenbrier Bunker — Project Greek Island [Facility Record UF-USA-0001]. Retrieved from deepundergroundmilitarybases.com/database/underground-facilities/usa/greenbrier/ (Accessed March 27, 2026).
BLOCK 13 — SUBMIT A CORRECTION OR NEW EVIDENCE
This record is maintained by the D.U.M.B. Database editorial team. If you have new evidence, a source correction, or additional documentation relating to this facility, please submit it through our contribution portal. All submissions are reviewed against our evidence standards before any record is updated.
SUBMIT NEW EVIDENCE OR FLAG AN ERROR →
D.U.M.B. DATABASE · PUBLIC INTEREST RESEARCH · ALL DATA FROM PUBLIC RECORDS ONLY FORM DB-UF-001 · REV. 2026.03