# Relationship history for MSHA mine 1514374

Current hierarchy: **Lewis Danny-Fount Brock → K E V Contracting → 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

- **controller_controls_mine:** Ledford Terry & Roger Gray Et Al → No 1 Mine; 1982-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jetco Coal Company → No 1 Mine; 1983-12-01 to 1986-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Ledford Terry & Roger Gray Et Al → Jetco Coal Company; 1983-12-01 to 1986-11-03; source msha-controller-operator-history
- **operator_operates_mine:** K E V Contracting → No 1 Mine; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Danny-Fount Brock Et Al → No 1 Mine; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Danny-Fount Brock Et Al → K E V Contracting; 1986-11-04 to current/open; source msha-controller-operator-history