# Relationship history for MSHA mine 1511247

Current hierarchy: **Smith Jim R → Jim Smith Contracting Company Inc → Smith Coal No 3**

- 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:** Smith Jim R → Smith Coal No 3; 1974-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jim Smith Contracting Company Inc → Smith Coal No 3; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Jim R → Jim Smith Contracting Company Inc; 1978-01-01 to current/open; source msha-controller-operator-history