# Relationship history for MSHA mine 3607772

Current hierarchy: **John  Lenick → Lone Eagle Coal Company Inc → Lone Eagle Mine**

- 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:** B B Z Research Inc → Lone Eagle Mine; 1985-12-01 to 1991-10-17; source msha-controller-operator-history
- **controller_controls_mine:** John  Lenick et al → Lone Eagle Mine; 1985-12-01 to 1991-10-17; source msha-controller-operator-history
- **controller_controls_operator:** John  Lenick et al → B B Z Research Inc; 1985-12-01 to 1991-10-17; source msha-controller-operator-history
- **operator_operates_mine:** B B Z Research Inc → Lone Eagle Mine; 1991-10-18 to 1997-02-02; source msha-controller-operator-history
- **controller_controls_mine:** James J  Curran Jr → Lone Eagle Mine; 1991-10-18 to 1997-02-02; source msha-controller-operator-history
- **controller_controls_operator:** James J  Curran Jr → B B Z Research Inc; 1991-10-18 to 1997-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Lone Eagle Coal Company Inc → Lone Eagle Mine; 1997-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Lenick et al → Lone Eagle Mine; 1997-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Lenick et al → Lone Eagle Coal Company Inc; 1997-02-03 to current/open; source msha-controller-operator-history