# Relationship history for MSHA mine 1510251

Current hierarchy: **Rogers Paul & Buddy → Supreme Mining Company → No 15 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:** Webb Elmer → No 15 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Webb Coal Company Inc → No 15 Mine; 1977-03-01 to 1978-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Webb Elmer → Webb Coal Company Inc; 1977-03-01 to 1978-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Supreme Mining Company → No 15 Mine; 1978-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Paul & Buddy → No 15 Mine; 1978-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Paul & Buddy → Supreme Mining Company; 1978-04-11 to current/open; source msha-controller-operator-history