# Relationship history for MSHA mine 4404867

Current hierarchy: **Russ Robert G--Roger Proffitt & Danny Nichols → N R & P 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Little Branch Coal Company → No 1 Mine; 1977-09-01 to 1978-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Ward Jack & H C Vandyke → No 1 Mine; 1977-09-01 to 1978-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Ward Jack & H C Vandyke → Little Branch Coal Company; 1977-09-01 to 1978-03-16; source msha-controller-operator-history
- **operator_operates_mine:** N R & P Coal Company → No 1 Mine; 1978-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russ Robert G--Roger Proffitt & Danny Nichols → No 1 Mine; 1978-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russ Robert G--Roger Proffitt & Danny Nichols → N R & P Coal Company; 1978-03-17 to current/open; source msha-controller-operator-history