# Relationship history for MSHA mine 2402229

Current hierarchy: **Bridger  Bischoff → Rock Solid Inc. → McLaughlin Site/Other**

- 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:** Rock Solid Inc. → McLaughlin Site/Other; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bridger  Bischoff → McLaughlin Site/Other; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bridger  Bischoff → Rock Solid Inc.; 2001-08-01 to current/open; source msha-controller-operator-history