# Relationship history for MSHA mine 3303747

Current hierarchy: **Phil A  Bowman → R A Eberts Company Inc → Dark Hollow I**

- 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:** Stewart William → Dark Hollow I; 1977-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stewart Coal Company → Dark Hollow I; 1979-04-01 to 1995-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Stewart William → Stewart Coal Company; 1979-04-01 to 1995-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Phil A  Bowman  et al → Dark Hollow I; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R A Eberts Company Inc → Dark Hollow I; 1995-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phil A  Bowman  et al → R A Eberts Company Inc; 1995-07-01 to current/open; source msha-controller-operator-history