# Relationship history for MSHA mine 1512697

Current hierarchy: **Tucker Stevie → S & J Construction → 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:** S & J Construction → No 1 Site; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tucker Stevie → No 1 Site; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tucker Stevie → S & J Construction; 1981-01-01 to current/open; source msha-controller-operator-history