# Relationship history for MSHA mine 1513687

Current hierarchy: **Smith Joe & Mike Breeding → M & J Construction Company → No 1 Site**

- 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 & J Construction Company → No 1 Site; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Joe & Mike Breeding → No 1 Site; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Joe & Mike Breeding → M & J Construction Company; 1982-08-01 to current/open; source msha-controller-operator-history