# Relationship history for MSHA mine 3501269

Current hierarchy: **Gurley Phillip S → Jenco Enterprises Inc → Jensen**

- 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:** Jensens Shale Pit Inc → Jensen; 1950-01-01 to 1981-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Jensen Burton J → Jensen; 1950-01-01 to 1981-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Jensen Burton J → Jensens Shale Pit Inc; 1950-01-01 to 1981-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Gurley Phillip S → Jensen; 1981-03-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jenco Enterprises Inc → Jensen; 1981-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gurley Phillip S → Jenco Enterprises Inc; 1981-09-02 to current/open; source msha-controller-operator-history