# Relationship history for MSHA mine 1513642

Current hierarchy: **Ellison Stanley E → S E Coal → No 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

- **operator_operates_mine:** D & T Coal Company → No 1; 1982-08-01 to 1983-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Chester-William Middleton Et Al → No 1; 1982-08-01 to 1983-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Chester-William Middleton Et Al → D & T Coal Company; 1982-08-01 to 1983-07-24; source msha-controller-operator-history
- **operator_operates_mine:** S E Coal → No 1; 1983-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ellison Stanley E → No 1; 1983-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellison Stanley E → S E Coal; 1983-07-25 to current/open; source msha-controller-operator-history