# Relationship history for MSHA mine 4605641

Current hierarchy: **Gould Inc → Gould Mining Inc → Valley Fill Surface**

- 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:** Gould Inc → Valley Fill Surface; 1975-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Viking Pocahontas Inc → Valley Fill Surface; 1977-10-01 to 1987-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Gould Inc → Viking Pocahontas Inc; 1977-10-01 to 1987-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Resources Inc → Valley Fill Surface; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Corp Of America Inc → Valley Fill Surface; 1987-04-15 to 1990-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Resources Inc → Coal Corp Of America Inc; 1987-04-15 to 1990-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Viking Pocahontas Inc → Valley Fill Surface; 1990-08-03 to 1991-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Gould Inc → Viking Pocahontas Inc; 1990-08-03 to 1991-04-21; source msha-controller-operator-history
- **operator_operates_mine:** U S Coals Inc → Valley Fill Surface; 1991-04-22 to 1991-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Michael J  Hudak → Valley Fill Surface; 1991-04-22 to 1991-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Hudak → U S Coals Inc; 1991-04-22 to 1991-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Bowen Max → Valley Fill Surface; 1991-07-15 to 1992-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Iroquois Coal Corp → Valley Fill Surface; 1991-11-05 to 1992-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Bowen Max → Iroquois Coal Corp; 1991-11-05 to 1992-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Gould Mining Inc → Valley Fill Surface; 1992-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gould Inc → Valley Fill Surface; 1992-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gould Inc → Gould Mining Inc; 1992-01-17 to current/open; source msha-controller-operator-history