# Relationship history for MSHA mine 1700848

Current hierarchy: **Douglas A  Wilson; Dennis A  Wilson → D.A. Wilson Co., LLC → Cole 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

- **operator_operates_mine:** D.A. Wilson Co., LLC → Cole Pit; 2009-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis A  Wilson et al → Cole Pit; 2009-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis A  Wilson et al → D.A. Wilson Co., LLC; 2009-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Wilson et al → D.A. Wilson Co., LLC; 2009-07-07 to current/open; source msha-controller-operator-history