# Relationship history for MSHA mine 2700317

Current hierarchy: **Richard  Charbonneau; Mark  Charbonneau → CONTINENTAL PAVING, INC. → CONCORD 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

- **controller_controls_mine:** Mark  Charbonneau  et al → CONCORD SAND & GRAVEL; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert A  Cole → CONCORD SAND & GRAVEL; 1987-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Concord Sand & Gravel Inc → CONCORD SAND & GRAVEL; 1997-10-01 to 2010-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Cole → Concord Sand & Gravel Inc; 1997-10-01 to 2010-04-08; source msha-controller-operator-history
- **operator_operates_mine:** CONTINENTAL PAVING, INC. → CONCORD SAND & GRAVEL; 2010-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Charbonneau  et al → CONTINENTAL PAVING, INC.; 2010-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Charbonneau  et al → CONTINENTAL PAVING, INC.; 2010-04-09 to current/open; source msha-controller-operator-history