# Relationship history for MSHA mine 1510245

Current hierarchy: **Mc Neil Dearl → Mc Neil Trucking Corp → No 1 Strip**

- 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:** J & S Coal Company → No 1 Strip; 1976-12-01 to 1977-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Duncan Virgil & C Johnson → No 1 Strip; 1976-12-01 to 1977-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Duncan Virgil & C Johnson → J & S Coal Company; 1976-12-01 to 1977-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Mc Neil Trucking Corp → No 1 Strip; 1977-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Neil Dearl → No 1 Strip; 1977-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Neil Dearl → Mc Neil Trucking Corp; 1977-05-24 to current/open; source msha-controller-operator-history