# Relationship history for MSHA mine 1800464

Current hierarchy: **J Clifford  Forrest III → Action Mining Inc → Sanner**

- 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:** Robert T  Sanner → Sanner; 1950-01-01 to 1980-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Tosco Corp → Sanner; 1950-01-01 to 1988-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Sanner Brothers Coal Company → Sanner; 1973-08-01 to 1977-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Sanner → Sanner Brothers Coal Company; 1973-08-01 to 1977-07-14; source msha-controller-operator-history
- **operator_operates_mine:** River Hill Coal Company Inc → Sanner; 1977-07-15 to 1981-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Tosco Corp → River Hill Coal Company Inc; 1977-07-15 to 1981-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Action Mining Inc → Sanner; 1981-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas L  Sanner et al → Sanner; 1981-06-25 to 2011-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Douglas L  Sanner et al → Action Mining Inc; 1981-06-25 to 2011-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Larry R  Sanner et al → Action Mining Inc; 1981-06-25 to 2011-01-12; source msha-controller-operator-history
- **controller_controls_mine:** J Clifford  Forrest III → Sanner; 2011-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Clifford  Forrest III → Action Mining Inc; 2011-01-13 to current/open; source msha-controller-operator-history