# Relationship history for MSHA mine 3303331

Current hierarchy: **Thompson Harry → Lawco Energy Inc → No 2 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

- **controller_controls_mine:** Sepe Jerry → No 2 Strip; 1974-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cannon Creek Development Company → No 2 Strip; 1975-06-01 to 1975-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Cannon Creek Development Company → No 2 Strip; 1975-06-01 to 1975-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Cannon Creek Development Company → Cannon Creek Development Company; 1975-06-01 to 1975-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Triple V Contracting Inc → No 2 Strip; 1975-10-14 to 1976-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Sepe Jerry → Triple V Contracting Inc; 1975-10-14 to 1976-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Lawco Energy Inc → No 2 Strip; 1976-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Harry → No 2 Strip; 1976-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Harry → Lawco Energy Inc; 1976-09-16 to current/open; source msha-controller-operator-history