# Relationship history for MSHA mine 1701189

Current hierarchy: **Brent  Anderson → Anderson Septic Tank Pumping Inc → Anderson**

- 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:** Anderson Septic Tank Pumping Inc → Anderson; 2026-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Anderson → Anderson; 2026-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Anderson → Anderson Septic Tank Pumping Inc; 2026-05-14 to current/open; source msha-controller-operator-history