# Relationship history for MSHA mine 4608002

Current hierarchy: **Pearson Frank-Wendel Bias → Laurel Coal Corp → Coalburg 9a**

- 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:** Pauley William S → Coalburg 9a; 1983-01-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Swamp Fox Development Inc → Coalburg 9a; 1991-02-01 to 1995-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Pauley William S → Swamp Fox Development Inc; 1991-02-01 to 1995-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Pearson Frank-Wendel Bias Et Al → Coalburg 9a; 1994-07-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Coal Corp → Coalburg 9a; 1995-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pearson Frank-Wendel Bias Et Al → Laurel Coal Corp; 1995-12-05 to current/open; source msha-controller-operator-history