# Relationship history for MSHA mine 4002767

Current hierarchy: **Crocker Wayne → Bethel Mining Inc → Or_Tenn Mine #1**

- 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:** Gurganus Bruce → Or_Tenn Mine #1; 1980-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bethel Mining Company Inc → Or_Tenn Mine #1; 1981-11-01 to 1982-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Gurganus Bruce → Bethel Mining Company Inc; 1981-11-01 to 1982-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Bethel Mining Inc → Or_Tenn Mine #1; 1982-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crocker Wayne → Or_Tenn Mine #1; 1982-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crocker Wayne → Bethel Mining Inc; 1982-04-21 to current/open; source msha-controller-operator-history