# Relationship history for MSHA mine 1508161

Current hierarchy: **Jones Jackie--Leith Stewart → S & J Coal Company → No 1 Prep Plant**

- 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:** Ratliff James Delbert-Danny L & Donald E → No 1 Prep Plant; 1974-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Regina Fuel Company → No 1 Prep Plant; 1975-03-18 to 1976-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff James Delbert-Danny L & Donald E → Regina Fuel Company; 1975-03-18 to 1976-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Jones Jackie--Leith Stewart Et Al → No 1 Prep Plant; 1975-07-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & J Coal Company → No 1 Prep Plant; 1976-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Jackie--Leith Stewart Et Al → S & J Coal Company; 1976-01-16 to current/open; source msha-controller-operator-history