Project 816 Underground Nuclear Weapons Factory
Sector: Oil and Gas • Location: Fuling, Chongqing, China
Source: CPG Click Petróleo e Gás
Project 816 was a secret Chinese project approved in 1966 to construct an underground nuclear weapons factory inside a mountain in the Fuling region (now part of Chongqing). Over 60,000 workers excavated 20 km of tunnels, creating the world's largest artificial underground structure with 13 levels, 18 caves, and a 79.6-meter high main cavern. The project was 85% complete when it was canceled in Fe
- Status
- Closed
- Sector
- Oil and Gas, Manufacturing (Industrial), Government, Nuclear
- Location
- Fuling, Chongqing, China
- Updated
- 22 Jul 2026
- Source
- CPG Click Petróleo e Gás
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Project Information
Participants
| Not available for this record. |
Status
Original status | cancelled |
Taiyo status | Closed |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | Project 816 was a secret Chinese project approved in 1966 to construct an underground nuclear weapons factory inside a mountain in the Fuling region (now part of Chongqing). Over 60,000 workers excavated 20 km of tunnels, creating the world's largest artificial underground structure with 13 levels, 18 caves, and a 79.6-meter high main cavern. The project was 85% complete when it was canceled in February 1984 and never became operational. It remained classified until 2002 and was opened to the public as a tourist attraction in 2010. |
Original sector | Construction |
Location
Country | China |
State | Chongqing |
City | Fuling |
Source
Source | CPG Click Petróleo e Gás |
URL |
More Details
Record type | Project |
Sector | Oil and Gas, Manufacturing (Industrial), Government, Nuclear |
Article published date | 2026-05-01 |
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