# Relationship history for MSHA mine 1510328

Current hierarchy: **Mountain Top Fuel Inc → Mountain Top Fuel Inc → No 1 Tipple**

- 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

- **controller_controls_mine:** Potter A C → No 1 Tipple; 1975-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Top Fuel Inc → No 1 Tipple; 1976-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cougar Fuel Inc → No 1 Tipple; 1977-04-01 to 1977-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Potter A C → Cougar Fuel Inc; 1977-04-01 to 1977-10-17; source msha-controller-operator-history
- **operator_operates_mine:** King Coal Fuel → No 1 Tipple; 1977-10-18 to 1978-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Stanley J → No 1 Tipple; 1977-10-18 to 1978-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Stanley J → King Coal Fuel; 1977-10-18 to 1978-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Top Fuel Inc → No 1 Tipple; 1978-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Top Fuel Inc → Mountain Top Fuel Inc; 1978-05-09 to current/open; source msha-controller-operator-history