# Relationship history for MSHA mine 3001003

Current hierarchy: **James H  Kinley → KINLEY SAND & GRAVEL → KINLEY 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:** Work & Silvis Company Inc → KINLEY SAND & GRAVEL; 1950-01-01 to 2002-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Harry W  Silvis → KINLEY SAND & GRAVEL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry W  Silvis → Work & Silvis Company Inc; 1950-01-01 to 2002-12-19; source msha-controller-operator-history
- **operator_operates_mine:** KINLEY SAND & GRAVEL → KINLEY SAND & GRAVEL; 2002-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Kinley → KINLEY SAND & GRAVEL; 2002-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Kinley → KINLEY SAND & GRAVEL; 2002-12-20 to current/open; source msha-controller-operator-history