# Relationship history for MSHA mine 0504079

Current hierarchy: **Dan L  Weber; Vicki C  Weber → Hardrock Custom Crushing LLC → E J 1213**

- 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:** Hardrock Sand & Gravel → E J 1213; 1985-07-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Weber  et al → E J 1213; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Weber  et al → Hardrock Sand & Gravel; 1985-07-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Pat  Weber  et al → Hardrock Sand & Gravel; 1985-07-01 to 2006-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Hardrock Custom Crushing LLC → E J 1213; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan L  Weber et al → E J 1213; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan L  Weber et al → Hardrock Custom Crushing LLC; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vicki C  Weber et al → Hardrock Custom Crushing LLC; 2007-01-01 to current/open; source msha-controller-operator-history