# Relationship history for MSHA mine 2602828

Current hierarchy: **Hart  Baitis; Joe  Kircher → Placer Solutions LLC → Pine Grove Reclaim Project**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Placer Solutions LLC → Pine Grove Reclaim Project; 2019-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Kircher et al → Pine Grove Reclaim Project; 2019-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Kircher et al → Placer Solutions LLC; 2019-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hart  Baitis et al → Placer Solutions LLC; 2019-04-23 to current/open; source msha-controller-operator-history