# Relationship history for MSHA mine 2401713

Current hierarchy: **Seahawk Inc → Seahawk Inc → Seahawk Incorporated**

- 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:** Missoula Mining → Seahawk Incorporated; 1983-04-01 to 1984-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Harper Don → Seahawk Incorporated; 1983-04-01 to 1984-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Harper Don → Missoula Mining; 1983-04-01 to 1984-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Gold Hill Placers Inc → Seahawk Incorporated; 1984-04-12 to 1986-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Wogamon Don → Seahawk Incorporated; 1984-04-12 to 1986-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Wogamon Don → Gold Hill Placers Inc; 1984-04-12 to 1986-10-19; source msha-controller-operator-history
- **operator_operates_mine:** B B Mining Inc → Seahawk Incorporated; 1986-10-20 to 1990-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Lunan Larry N → Seahawk Incorporated; 1986-10-20 to 1990-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Lunan Larry N → B B Mining Inc; 1986-10-20 to 1990-02-27; source msha-controller-operator-history
- **operator_operates_mine:** Seahawk Inc → Seahawk Incorporated; 1990-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Seahawk Inc → Seahawk Incorporated; 1990-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Seahawk Inc → Seahawk Inc; 1990-02-28 to current/open; source msha-controller-operator-history