# Relationship history for MSHA mine 2300140

Current hierarchy: **Roy L Burns → Pace Construction Company LLC → Pace Construction Danville Quarry**

- 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 Clain Lime Quarry → Pace Construction Danville Quarry; 1950-01-01 to 1997-08-27; source msha-controller-operator-history
- **controller_controls_mine:** William H  McClain → Pace Construction Danville Quarry; 1950-01-01 to 1997-08-27; source msha-controller-operator-history
- **controller_controls_operator:** William H  McClain → Mc Clain Lime Quarry; 1950-01-01 to 1997-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Pace Construction Company LLC → Pace Construction Danville Quarry; 1997-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roy L Burns → Pace Construction Danville Quarry; 1997-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy L Burns → Pace Construction Company LLC; 1997-08-28 to current/open; source msha-controller-operator-history