FOIA Central
Freedom of Information Act requests and declassified documents related to underground facilities and government infrastructure projects.
FOIA Documents & Requests
Freedom of Information Act requests and declassified documents related to underground facilities and government infrastructure projects.
How We Use FOIA
Research & Identify
We research potential underground facilities through budget documents, contracting records, and news reports to identify targets for FOIA requests.
File Strategic Requests
We file carefully crafted FOIA requests to multiple agencies including DoD, DHS, GSA, and Corps of Engineers for construction and operational details.
Verify & Document
All released documents are analyzed, verified, and cross-referenced with other sources before being incorporated into our database.
Key Agencies & Sources
Primary Agencies
Additional Sources
Types of Documents Retrieved
Construction Contracts
Detailed specifications and costs
Site Plans
Facility layouts and blueprints
Budget Documents
Congressional appropriations
Operational Reports
Status and activity summaries
Access Our FOIA Archive
Browse our complete collection of FOIA documents, search by agency or facility, and download verified government records about underground infrastructure.
Document Search & Database
Search through thousands of declassified documents, FOIA releases, and government records related to underground facilities
Search Results
Cheyenne Mountain Complex Modernization Contract
Department of Defense contract documents for the modernization of NORAD facilities at Cheyenne Mountain, including specifications for deep underground construction and hardening against electromagnetic pulse...
Mount Weather Emergency Operations Center Plans
Architectural blueprints and facility layouts for the Mount Weather Emergency Operations Center, showing underground levels, communication systems, and emergency protocols. Heavily redacted sections...
Denver Airport Underground Construction Budget
Army Corps of Engineers budget documentation for underground construction projects at Denver International Airport, including tunnel systems, baggage handling, and emergency facilities...