# Relationship history for MSHA mine 1509829

Current hierarchy: **Belcher Ralph & Goebel Collins → Belcher & Collins Coal Company → No 14c 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:** Cantrell Robert E → No 14c Mine; 1975-04-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Joeboner Elkhorn Coal Company Inc → No 14c Mine; 1976-07-26 to 1976-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Cantrell Robert E → Joeboner Elkhorn Coal Company Inc; 1976-07-26 to 1976-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Belcher & Collins Coal Company → No 14c Mine; 1976-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Belcher Ralph & Goebel Collins → No 14c Mine; 1976-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Belcher Ralph & Goebel Collins → Belcher & Collins Coal Company; 1976-10-26 to current/open; source msha-controller-operator-history