# Relationship history for MSHA mine 4403874

Current hierarchy: **Justus Kerry Shawn & Charles Blankenship → Shorty 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:** Buccaneer Coal Company Inc → No 1 Mine; 1974-06-01 to 1982-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Street Claude → No 1 Mine; 1974-06-01 to 1982-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Street Claude → Buccaneer Coal Company Inc; 1974-06-01 to 1982-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Prater Betty → No 1 Mine; 1981-03-25 to 1988-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Mack Coal Corp → No 1 Mine; 1982-01-11 to 1986-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Prater Betty → Mack Coal Corp; 1982-01-11 to 1986-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Shorty Mining Company → No 1 Mine; 1986-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justus Kerry Shawn & Charles Blankenship → No 1 Mine; 1986-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justus Kerry Shawn & Charles Blankenship → Shorty Mining Company; 1986-05-09 to current/open; source msha-controller-operator-history