# Relationship history for MSHA mine 1515284

Current hierarchy: **William W  Thomas Jr → Old South Trading Corp → Washer**

- 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:** Tom Coal Company Inc → Washer; 1985-07-01 to 1993-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Turner → Washer; 1985-07-01 to 1993-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Turner → Tom Coal Company Inc; 1985-07-01 to 1993-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Dartmont Processing Corp → Washer; 1993-04-05 to 1994-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Johnny  Pace → Washer; 1993-04-05 to 1994-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Johnny  Pace → Dartmont Processing Corp; 1993-04-05 to 1994-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Ricky D  Franklin → Washer; 1993-05-05 to 1995-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Processing Inc → Washer; 1994-01-17 to 1995-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Ricky D  Franklin → Mountain Processing Inc; 1994-01-17 to 1995-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Old South Trading Corp → Washer; 1995-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William W  Thomas Jr → Washer; 1995-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William W  Thomas Jr → Old South Trading Corp; 1995-02-02 to current/open; source msha-controller-operator-history