# Relationship history for MSHA mine 4701176

Current hierarchy: **Stephen W Verrette → Gillett Cement Products → Gillett Pit & Mill**

- 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:** Gillett Cement Products Inc → Gillett Pit & Mill; 1950-01-01 to 2005-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Streblow → Gillett Pit & Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Streblow → Gillett Cement Products Inc; 1950-01-01 to 2005-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Gillett Cement Products → Gillett Pit & Mill; 2005-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen W Verrette → Gillett Pit & Mill; 2005-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen W Verrette → Gillett Cement Products; 2005-08-26 to current/open; source msha-controller-operator-history