# Relationship history for MSHA mine 4608225

Current hierarchy: **Terry  Cline → Cline Excavation Corp → Bluestone #46**

- 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

- **controller_controls_mine:** Simpson & Lester Coals Inc → Bluestone #46; 1986-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Simpson & Lester Coals Inc → Bluestone #46; 1992-10-01 to 1995-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Simpson & Lester Coals Inc → Simpson & Lester Coals Inc; 1992-10-01 to 1995-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Garretson Roy → Bluestone #46; 1994-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Cline → Bluestone #46; 1995-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K & C Energy Inc → Bluestone #46; 1995-10-31 to 1995-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Garretson Roy → K & C Energy Inc; 1995-10-31 to 1995-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Son Energy Inc → Bluestone #46; 1995-12-07 to 1997-12-28; source msha-controller-operator-history
- **controller_controls_mine:** England Chris → Bluestone #46; 1995-12-07 to 1997-12-28; source msha-controller-operator-history
- **controller_controls_operator:** England Chris → Son Energy Inc; 1995-12-07 to 1997-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Cline Excavation Corp → Bluestone #46; 1997-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Cline → Cline Excavation Corp; 1997-12-29 to current/open; source msha-controller-operator-history