# Relationship history for MSHA mine 3304566

Current hierarchy: **Danny  Dean → WV PLC Repair, Inc. → SHM26**

- 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

- **controller_controls_mine:** Charles C  Ungurean → SHM26; 1950-01-01 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Oxford Mining Co. LLC → SHM26; 2006-04-05 to 2021-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Ungurean → Oxford Mining Co. LLC; 2006-04-05 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → SHM26; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Oxford Mining Co. LLC; 2015-01-01 to 2021-02-22; source msha-controller-operator-history
- **operator_operates_mine:** WV PLC Repair, Inc. → SHM26; 2021-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Dean → SHM26; 2021-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Dean → WV PLC Repair, Inc.; 2021-02-23 to current/open; source msha-controller-operator-history