# Relationship history for MSHA mine 1512996

Current hierarchy: **Gary D  Fields → Fields Coal Company Inc → No 34 Mine**

- 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:** Ebbtide Coal Company Inc → No 34 Mine; 1981-07-01 to 1982-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Bevins William Ray → No 34 Mine; 1981-07-01 to 1982-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Bevins William Ray → Ebbtide Coal Company Inc; 1981-07-01 to 1982-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Fields Coal Company Inc → No 34 Mine; 1982-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary D  Fields → No 34 Mine; 1982-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary D  Fields → Fields Coal Company Inc; 1982-10-18 to current/open; source msha-controller-operator-history