# Relationship history for MSHA mine 1512512

Current hierarchy: **Paul J  Sturgill → Wave Mining Company Inc → No 2 Deep 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:** Paul J  Sturgill → No 2 Deep Mine; 1977-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wave Mining Company Inc → No 2 Deep Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Wave Mining Company Inc; 1980-08-01 to current/open; source msha-controller-operator-history