# Relationship history for MSHA mine 2200532

Current hierarchy: **J W  Saunders → J W Saunders Inc → SMITH PIT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J W Saunders Inc → SMITH PIT; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J W  Saunders → SMITH PIT; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J W  Saunders → J W Saunders Inc; 1981-03-01 to current/open; source msha-controller-operator-history