# Relationship history for MSHA mine 2700251

Current hierarchy: **Richard  Charbonneau; Mark  Charbonneau → Continental Paving Inc → LITCHFIELD 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:** Litchfield Sand & Gravel → LITCHFIELD SAND & GRAVEL; 1984-05-01 to 1991-03-17; source msha-controller-operator-history
- **controller_controls_mine:** James  Marcou et al → LITCHFIELD SAND & GRAVEL; 1984-05-01 to 1991-03-17; source msha-controller-operator-history
- **controller_controls_operator:** James  Marcou et al → Litchfield Sand & Gravel; 1984-05-01 to 1991-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Charbonneau  et al → LITCHFIELD SAND & GRAVEL; 1986-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Paving Inc → LITCHFIELD SAND & GRAVEL; 1991-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Charbonneau  et al → Continental Paving Inc; 1991-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Charbonneau  et al → Continental Paving Inc; 1991-03-18 to current/open; source msha-controller-operator-history