# Relationship history for MSHA mine 5001886

Current hierarchy: **John W Light; Paul J Light → Skookum Rock, LLC → Skookum Rock Quarry**

- 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:** Skookum Rock, LLC → Skookum Rock Quarry; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John W Light et al → Skookum Rock Quarry; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W Light et al → Skookum Rock, LLC; 2020-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul J Light et al → Skookum Rock, LLC; 2020-07-13 to current/open; source msha-controller-operator-history