# Relationship history for MSHA mine 1201976

Current hierarchy: **Greg  Olinger → United Minerals Inc → J & S Pit**

- 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:** Greg  Olinger → J & S Pit; 1979-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sexton Contracting Inc → J & S Pit; 1985-07-01 to 1986-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Sexton William (Wally) W Jr → J & S Pit; 1985-07-01 to 1986-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Sexton William (Wally) W Jr → Sexton Contracting Inc; 1985-07-01 to 1986-02-17; source msha-controller-operator-history
- **operator_operates_mine:** United Minerals Inc → J & S Pit; 1986-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Olinger → United Minerals Inc; 1986-02-18 to current/open; source msha-controller-operator-history