# Relationship history for MSHA mine 4104055

Current hierarchy: **Daniel P  Cook; Cindy  Cook → Cook Rock Products Inc → COOK ROCK PRODUCTS**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cook Rock Products Inc → COOK ROCK PRODUCTS; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel P  Cook  et al → COOK ROCK PRODUCTS; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel P  Cook  et al → Cook Rock Products Inc; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cindy  Cook  et al → Cook Rock Products Inc; 1998-09-01 to current/open; source msha-controller-operator-history