# Relationship history for MSHA mine 0503793

Current hierarchy: **Falcon Energy Inc → Twin Pines Investment Ltd Ptnrship/Falcon Energy → Twin Pines No 2 Coal Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Twin Pines Coal Company Inc → Twin Pines No 2 Coal Mine; 1982-09-01 to 1984-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Sprague Lester → Twin Pines No 2 Coal Mine; 1982-09-01 to 1984-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Sprague Lester → Twin Pines Coal Company Inc; 1982-09-01 to 1984-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Twin Pines Investment Ltd Ptnrship/Falcon Energy → Twin Pines No 2 Coal Mine; 1984-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Falcon Energy Inc Et Al → Twin Pines No 2 Coal Mine; 1984-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Falcon Energy Inc Et Al → Twin Pines Investment Ltd Ptnrship/Falcon Energy; 1984-11-16 to current/open; source msha-controller-operator-history