# Relationship history for MSHA mine 4105900

Current hierarchy: **Heather  Ellis; Ryan  Ellis → Bolted E Aggragates → Bolted E Aggragates**

- 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:** Bolted E Aggragates → Bolted E Aggragates; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Heather  Ellis et al → Bolted E Aggragates; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heather  Ellis et al → Bolted E Aggragates; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Ellis et al → Bolted E Aggragates; 2026-08-12 to current/open; source msha-controller-operator-history