# Relationship history for MSHA mine 0405554

Current hierarchy: **Nick  Leinen; Mitch  Leinen → Gail Materials → Portable Crusher (Rental)**

- 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

- **controller_controls_mine:** Lori  Leinen → Portable Crusher (Rental); 2000-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gail Materials → Portable Crusher (Rental); 2003-03-07 to 2007-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Lori  Leinen → Gail Materials; 2003-03-07 to 2007-12-17; source msha-controller-operator-history
- **operator_operates_mine:** Gail Materials → Portable Crusher (Rental); 2007-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mitch  Leinen et al → Portable Crusher (Rental); 2007-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitch  Leinen et al → Gail Materials; 2007-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick  Leinen et al → Gail Materials; 2007-12-18 to current/open; source msha-controller-operator-history