# Relationship history for MSHA mine 1513528

Current hierarchy: **ENI → Enoxy Coal Inc → Pevler 23-M**

- 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:** Fields Mason & Larry Ratliff → Pevler 23-M; 1975-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ENI → Pevler 23-M; 1982-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & M Coal Company Inc → Pevler 23-M; 1982-05-01 to 1984-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Fields Mason & Larry Ratliff → L & M Coal Company Inc; 1982-05-01 to 1984-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Enoxy Coal Inc → Pevler 23-M; 1984-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ENI → Enoxy Coal Inc; 1984-01-18 to current/open; source msha-controller-operator-history