# Relationship history for MSHA mine 4105189

Current hierarchy: **Cliff  Price → Blackjack Energy Services → Eagle Crusher**

- 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:** Blackjack Energy Services → Eagle Crusher; 2016-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cliff  Price → Eagle Crusher; 2016-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cliff  Price → Blackjack Energy Services; 2016-04-12 to current/open; source msha-controller-operator-history