# Relationship history for MSHA mine 3609430

Current hierarchy: **Daryl H  Williams → Blooming Grove Sand and Gravel Inc → Blooming Grove Sand and Gravel Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Daryl H  Williams → Blooming Grove Sand and Gravel Inc; 1987-05-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blooming Grove Sand and Gravel Inc → Blooming Grove Sand and Gravel Inc; 2006-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daryl H  Williams → Blooming Grove Sand and Gravel Inc; 2006-05-11 to current/open; source msha-controller-operator-history