# Relationship history for MSHA mine 3401225

Current hierarchy: **Selleck Larry & Don Sheppard → D & L Gravel Company → D & L GRAVEL CO.**

- 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:** Mc Coy Pit → D & L GRAVEL CO.; 1950-01-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy James E → D & L GRAVEL CO.; 1950-01-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy James E → Mc Coy Pit; 1950-01-01 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** D & L Gravel Company → D & L GRAVEL CO.; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Selleck Larry & Don Sheppard → D & L GRAVEL CO.; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Selleck Larry & Don Sheppard → D & L Gravel Company; 1992-06-01 to current/open; source msha-controller-operator-history