# Relationship history for MSHA mine 1502777

Current hierarchy: **Bartley Robert Earl & Michael Newsome → B & N Mining 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:** Stalker Coal Company → No 1 Mine; 1950-01-01 to 1973-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Stalker Coal Company → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stalker Coal Company → Stalker Coal Company; 1950-01-01 to 1973-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fuller Coal Company → No 1 Mine; 1973-05-16 to 1974-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Fuller Coal Company → No 1 Mine; 1973-05-16 to 1974-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Fuller Coal Company → Fuller Coal Company; 1973-05-16 to 1974-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Collins & Stiltner Coal Company → No 1 Mine; 1974-11-21 to 1975-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Collins & Stiltner Coal Company → No 1 Mine; 1974-11-21 to 1975-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Collins & Stiltner Coal Company → Collins & Stiltner Coal Company; 1974-11-21 to 1975-05-09; source msha-controller-operator-history
- **operator_operates_mine:** D C Wellman Coal Company → No 1 Mine; 1975-05-10 to 1976-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Wellman Clarence & Danny → No 1 Mine; 1975-05-10 to 1976-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Wellman Clarence & Danny → D C Wellman Coal Company; 1975-05-10 to 1976-08-15; source msha-controller-operator-history
- **operator_operates_mine:** J H & L Coal Company → No 1 Mine; 1976-08-16 to 1978-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Ramey Dottie J & Sharon K → No 1 Mine; 1976-08-16 to 1978-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Ramey Dottie J & Sharon K → J H & L Coal Company; 1976-08-16 to 1978-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Rita Coal Company → No 1 Mine; 1978-08-21 to 1981-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Rita Coal Company; 1978-08-21 to 1981-06-24; source msha-controller-operator-history
- **operator_operates_mine:** B & N Mining Company → No 1 Mine; 1981-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bartley Robert Earl & Michael Newsome → No 1 Mine; 1981-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Robert Earl & Michael Newsome → B & N Mining Company; 1981-06-25 to current/open; source msha-controller-operator-history