# Relationship history for MSHA mine 1514186

Current hierarchy: **Perkins Franklin & Jesse → Perkins Coal Company → No 1 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:** J & L Coal Company → No 1 Mine; 1983-09-01 to 1984-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Mc Donald Jess Et Al → No 1 Mine; 1983-09-01 to 1984-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Mc Donald Jess Et Al → J & L Coal Company; 1983-09-01 to 1984-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Perkins Coal Company → No 1 Mine; 1984-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perkins Franklin & Jesse → No 1 Mine; 1984-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perkins Franklin & Jesse → Perkins Coal Company; 1984-05-22 to current/open; source msha-controller-operator-history