# Relationship history for MSHA mine 0103340

Current hierarchy: **William J  Buck → Baldwin Co Construction Inc → Summerdale 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Baldwin Co Construction Inc → Summerdale Pit; 2006-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William J  Buck → Summerdale Pit; 2006-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Buck → Baldwin Co Construction Inc; 2006-02-08 to current/open; source msha-controller-operator-history