# Relationship history for MSHA mine 3304351

Current hierarchy: **William J  Rumpke; Thomas B  Rumpke → Rumpke Consolidated Company → RUMPKE MOUNTAIN MINING**

- 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:** Rumpke Consolidated Company → RUMPKE MOUNTAIN MINING; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William J  Rumpke et al → RUMPKE MOUNTAIN MINING; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Rumpke et al → Rumpke Consolidated Company; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas B  Rumpke et al → Rumpke Consolidated Company; 1995-03-01 to current/open; source msha-controller-operator-history