# Relationship history for MSHA mine 4300424

Current hierarchy: **Douglas R  Casella → Casella Construction Inc → Track Jaw Crusher LT 105**

- 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:** Route 5 Sand & Gravel Inc → Track Jaw Crusher LT 105; 1989-03-01 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_mine:** David A  Dattilio → Track Jaw Crusher LT 105; 1989-03-01 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_operator:** David A  Dattilio → Route 5 Sand & Gravel Inc; 1989-03-01 to 1990-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Route 5 Sand & Gravel → Track Jaw Crusher LT 105; 1990-03-01 to 2000-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Ralph A  Farrsworth → Track Jaw Crusher LT 105; 1990-03-01 to 2000-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Ralph A  Farrsworth → Route 5 Sand & Gravel; 1990-03-01 to 2000-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Douglas R  Casella → Track Jaw Crusher LT 105; 1998-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casella Construction Inc → Track Jaw Crusher LT 105; 2000-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas R  Casella → Casella Construction Inc; 2000-08-28 to current/open; source msha-controller-operator-history