# Relationship history for MSHA mine 2501178

Current hierarchy: **Loren L  Quinn → D & L Sand & Gravel LLC → D & L Sand & Gravel LLC**

- 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:** D & L Sand & Gravel → D & L Sand & Gravel LLC; 1998-04-01 to 2007-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Loren L  Quinn  et al → D & L Sand & Gravel LLC; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren L  Quinn  et al → D & L Sand & Gravel; 1998-04-01 to 2007-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Dean I  Quinn  et al → D & L Sand & Gravel; 1998-04-01 to 2007-08-15; source msha-controller-operator-history
- **operator_operates_mine:** D & L Sand & Gravel LLC → D & L Sand & Gravel LLC; 2007-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Loren L  Quinn → D & L Sand & Gravel LLC; 2007-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren L  Quinn → D & L Sand & Gravel LLC; 2007-08-16 to current/open; source msha-controller-operator-history