# Relationship history for MSHA mine 4801730

Current hierarchy: **Shawn G  Madden; Joseph L  Madden → Heritage Material & Supply → Heritage Material & Supply**

- 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:** Heritage Material & Supply → Heritage Material & Supply; 2008-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shawn G  Madden et al → Heritage Material & Supply; 2008-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn G  Madden et al → Heritage Material & Supply; 2008-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph L  Madden et al → Heritage Material & Supply; 2008-10-30 to current/open; source msha-controller-operator-history