# Relationship history for MSHA mine 3607452

Current hierarchy: **Ruch Lee & David Hoffman → L & P Coal Company → 4 Foot Vein**

- 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:** Flat Pitch Coal Company → 4 Foot Vein; 1983-04-01 to 1985-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Jerry W  Lucas Jr → 4 Foot Vein; 1983-04-01 to 1985-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Jerry W  Lucas Jr → Flat Pitch Coal Company; 1983-04-01 to 1985-03-13; source msha-controller-operator-history
- **operator_operates_mine:** L & P Coal Company → 4 Foot Vein; 1985-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ruch Lee & David Hoffman → 4 Foot Vein; 1985-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ruch Lee & David Hoffman → L & P Coal Company; 1985-03-14 to current/open; source msha-controller-operator-history