# Relationship history for MSHA mine 1516481

Current hierarchy: **Stacy Dennis → Base Enterprises Corp → #2 Surface**

- 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

- **controller_controls_mine:** Stacy Dennis → #2 Surface; 1984-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Base Enterprises Corp → #2 Surface; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Dennis → Base Enterprises Corp; 1988-09-01 to current/open; source msha-controller-operator-history