# Relationship history for MSHA mine 2003367

Current hierarchy: **Elmer  Hunderman; Douglas  Hunderman → Rocky-Top Sand & Gravel, LLC → Rocky-Top**

- 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:** Rocky-Top Sand & Gravel, LLC → Rocky-Top; 2006-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Hunderman et al → Rocky-Top; 2006-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Hunderman et al → Rocky-Top Sand & Gravel, LLC; 2006-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Hunderman et al → Rocky-Top Sand & Gravel, LLC; 2006-06-27 to current/open; source msha-controller-operator-history