# Relationship history for MSHA mine 3602278

Current hierarchy: **Gordon  Fletcher → Twin Creek Coal Inc → Swift Breaker**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Swift Coal Sales Inc → Swift Breaker; 1950-01-01 to 1990-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Adam  Swift → Swift Breaker; 1950-01-01 to 1990-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Adam  Swift → Swift Coal Sales Inc; 1950-01-01 to 1990-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Twin Creek Coal Inc → Swift Breaker; 1990-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gordon  Fletcher → Swift Breaker; 1990-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Fletcher → Twin Creek Coal Inc; 1990-08-07 to current/open; source msha-controller-operator-history