# Relationship history for MSHA mine 4300331

Current hierarchy: **Sherri  Tucker → R.E. Tucker Inc. → R.E.Tucker, Inc.-Northfield 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Town Of Northfield - VT → R.E.Tucker, Inc.-Northfield Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Du Bois Sand & Gravel → R.E.Tucker, Inc.-Northfield Pit; 1979-01-01 to 1980-10-02; source msha-controller-operator-history
- **controller_controls_mine:** William F  Du Bois → R.E.Tucker, Inc.-Northfield Pit; 1979-01-01 to 1980-10-02; source msha-controller-operator-history
- **controller_controls_operator:** William F  Du Bois → Du Bois Sand & Gravel; 1979-01-01 to 1980-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Town Of Northfield → R.E.Tucker, Inc.-Northfield Pit; 1980-10-03 to 1986-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Northfield - VT → Town Of Northfield; 1980-10-03 to 1986-05-05; source msha-controller-operator-history
- **operator_operates_mine:** R.E. Tucker Inc. → R.E.Tucker, Inc.-Northfield Pit; 1986-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald E  Tucker et al → R.E.Tucker, Inc.-Northfield Pit; 1986-05-06 to 2020-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Tucker et al → R.E. Tucker Inc.; 1986-05-06 to 2020-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Sherri  Tucker → R.E.Tucker, Inc.-Northfield Pit; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sherri  Tucker → R.E. Tucker Inc.; 2020-02-28 to current/open; source msha-controller-operator-history