# Relationship history for MSHA mine 1512852

Current hierarchy: **Elliott Lester & Tommy → E & E Coal Company → No 1 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

- **operator_operates_mine:** D & D Coal → No 1 Surface; 1981-05-01 to 1982-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Medlin Daniel L & Delbert Wilburn → No 1 Surface; 1981-05-01 to 1982-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Medlin Daniel L & Delbert Wilburn → D & D Coal; 1981-05-01 to 1982-08-15; source msha-controller-operator-history
- **operator_operates_mine:** E & E Coal Company → No 1 Surface; 1982-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elliott Lester & Tommy → No 1 Surface; 1982-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott Lester & Tommy → E & E Coal Company; 1982-08-16 to current/open; source msha-controller-operator-history