# Relationship history for MSHA mine 3002913

Current hierarchy: **Schultz William J → Schultz Construction Inc → Providence Mining 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:** Schultz Construction Inc → Providence Mining Pit; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Schultz William J → Providence Mining Pit; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schultz William J → Schultz Construction Inc; 1989-10-01 to current/open; source msha-controller-operator-history