# Relationship history for MSHA mine 2902531

Current hierarchy: **Wendy  Church; Greg  Church → Dola Rock Construction → Hooper 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:** Dola Rock Construction → Hooper Quarry; 2021-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wendy  Church et al → Hooper Quarry; 2021-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wendy  Church et al → Dola Rock Construction; 2021-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Church et al → Dola Rock Construction; 2021-05-11 to current/open; source msha-controller-operator-history