# Relationship history for MSHA mine 2700404

Current hierarchy: **David L Herrick; Marlo M Herrick → Warner Aggregates, LLC → Warner Aggregates, LLC**

- 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:** Warner Aggregates, LLC → Warner Aggregates, LLC; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marlo M Herrick et al → Warner Aggregates, LLC; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marlo M Herrick et al → Warner Aggregates, LLC; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David L Herrick et al → Warner Aggregates, LLC; 2005-04-13 to current/open; source msha-controller-operator-history