# Relationship history for MSHA mine 1514297

Current hierarchy: **Mullins Gary & Harold Smallwood → M & S Construction Company → No 4 Surface Mine (D)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** M & S Construction Company → No 4 Surface Mine (D); 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Gary & Harold Smallwood → No 4 Surface Mine (D); 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Gary & Harold Smallwood → M & S Construction Company; 1983-11-01 to current/open; source msha-controller-operator-history