# Relationship history for MSHA mine 3607289

Current hierarchy: **Hubler Chester L Jr-Chester L Sr & Richard L → C R & C Coal Company → No 6 Vein Slope**

- 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:** Valley Construction Coal Company → No 6 Vein Slope; 1982-04-01 to 1984-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Shade Todd M → No 6 Vein Slope; 1982-04-01 to 1984-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Shade Todd M → Valley Construction Coal Company; 1982-04-01 to 1984-10-15; source msha-controller-operator-history
- **operator_operates_mine:** C R & C Coal Company → No 6 Vein Slope; 1984-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hubler Chester L Jr-Chester L Sr & Richard L → No 6 Vein Slope; 1984-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hubler Chester L Jr-Chester L Sr & Richard L → C R & C Coal Company; 1984-10-16 to current/open; source msha-controller-operator-history