# Relationship history for MSHA mine 3901605

Current hierarchy: **Jason  Mehlhaff; Michael A  Kindt → Pro Crush LLC → Procrush1**

- 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:** Pro Crush LLC → Procrush1; 2014-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Mehlhaff et al → Procrush1; 2014-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Mehlhaff et al → Pro Crush LLC; 2014-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael A  Kindt et al → Pro Crush LLC; 2014-04-18 to current/open; source msha-controller-operator-history