# Relationship history for MSHA mine 1001978

Current hierarchy: **Terry L  Thurston → Thurston Construction Inc → CHERRYVILLE PIT**

- 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:** Thurston Construction Inc → CHERRYVILLE PIT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry L  Thurston → CHERRYVILLE PIT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry L  Thurston → Thurston Construction Inc; 2000-06-01 to current/open; source msha-controller-operator-history