# Relationship history for MSHA mine 0301655

Current hierarchy: **Jason Blu  Clay → Clay's Sand & Gravel → Clay's Sand & Gravel**

- 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:** Pea Ridge Sand & Gravel Inc → Clay's Sand & Gravel; 1989-05-01 to 1998-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Clinton  McKenzie → Clay's Sand & Gravel; 1989-05-01 to 1998-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Clinton  McKenzie → Pea Ridge Sand & Gravel Inc; 1989-05-01 to 1998-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Sanders Sand & Gravel Inc → Clay's Sand & Gravel; 1998-01-21 to 2005-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Sanders → Clay's Sand & Gravel; 1998-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Sanders → Sanders Sand & Gravel Inc; 1998-01-21 to 2005-02-07; source msha-controller-operator-history
- **operator_operates_mine:** P-N-P Sand & Gravel → Clay's Sand & Gravel; 2005-02-08 to 2005-05-08; source msha-controller-operator-history
- **controller_controls_mine:** Perry S  Chupp et al → Clay's Sand & Gravel; 2005-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry S  Chupp et al → P-N-P Sand & Gravel; 2005-02-08 to 2005-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Paul W  Fields et al → P-N-P Sand & Gravel; 2005-02-08 to 2005-05-08; source msha-controller-operator-history
- **operator_operates_mine:** P and P Sand & Gravel → Clay's Sand & Gravel; 2005-05-09 to 2006-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Perry S  Chupp → Clay's Sand & Gravel; 2005-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry S  Chupp → P and P Sand & Gravel; 2005-05-09 to 2006-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Clay's Sand & Gravel → Clay's Sand & Gravel; 2006-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason Blu  Clay → Clay's Sand & Gravel; 2006-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason Blu  Clay → Clay's Sand & Gravel; 2006-01-02 to current/open; source msha-controller-operator-history