# Relationship history for MSHA mine 2501274

Current hierarchy: **Todd D  Schutz; Anthony T  Weverka → Weverka Sand & Gravel LLC → Bart's Hole**

- 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:** Weverka Sand & Gravel LLC → Bart's Hole; 2011-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony T  Weverka et al → Bart's Hole; 2011-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony T  Weverka et al → Weverka Sand & Gravel LLC; 2011-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd D  Schutz et al → Weverka Sand & Gravel LLC; 2011-03-09 to current/open; source msha-controller-operator-history