# Relationship history for MSHA mine 4404290

Current hierarchy: **Ward Jack-Joe Mullins & Gary Keen → Little Branch 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Chubby Coal Company → No 1 Mine; 1976-03-06 to 1976-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Keen Cloyd → No 1 Mine; 1976-03-06 to 1977-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Keen Cloyd → Chubby Coal Company; 1976-03-06 to 1976-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Little Branch Coal Company → No 1 Mine; 1976-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ward Jack-Joe Mullins & Gary Keen → No 1 Mine; 1976-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ward Jack-Joe Mullins & Gary Keen → Little Branch Coal Company; 1976-06-13 to current/open; source msha-controller-operator-history