# Relationship history for MSHA mine 4300225

Current hierarchy: **Ross Ernest E → Je & Pn Inc → The 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:** Town Of Fairfax → The Pit; 1950-01-01 to 1978-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Fairfax-Vt → The Pit; 1950-01-01 to 1992-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Fairfax-Vt → Town Of Fairfax; 1950-01-01 to 1978-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Webb Gravel & Sand → The Pit; 1978-09-01 to 1986-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Webb J Douglas → The Pit; 1978-09-01 to 1986-07-01; source msha-controller-operator-history
- **controller_controls_operator:** Webb J Douglas → Webb Gravel & Sand; 1978-09-01 to 1986-07-01; source msha-controller-operator-history
- **operator_operates_mine:** Town Of Fairfax → The Pit; 1986-07-02 to 1992-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Fairfax-Vt → Town Of Fairfax; 1986-07-02 to 1992-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Je & Pn Inc → The Pit; 1992-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ross Ernest E → The Pit; 1992-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ross Ernest E → Je & Pn Inc; 1992-05-14 to current/open; source msha-controller-operator-history