# Relationship history for MSHA mine 3600967

Current hierarchy: **Thomas M  Hull; Michael P  Carlow → Interstate Thermal Energy Conversion Corp → Clyde 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bcnr Mining Corp → Clyde Mine; 1950-01-01 to 1985-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Republic Steel Corp → Clyde Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Republic Steel Corp → Bcnr Mining Corp; 1950-01-01 to 1985-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Bcnr Mining Corp → Clyde Mine; 1985-01-28 to 1989-11-08; source msha-controller-operator-history
- **controller_controls_mine:** LTV Corporation → Clyde Mine; 1985-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LTV Corporation → Bcnr Mining Corp; 1985-01-28 to 1989-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Interstate Thermal Energy Conversion Corp → Clyde Mine; 1989-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael P  Carlow et al → Clyde Mine; 1989-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael P  Carlow et al → Interstate Thermal Energy Conversion Corp; 1989-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas M  Hull et al → Interstate Thermal Energy Conversion Corp; 1989-11-09 to current/open; source msha-controller-operator-history