# Relationship history for MSHA mine 2103996

Current hierarchy: **Bruce S  Goodrich → R&E Enterprises of Mankato Inc → Cedar Rapids Crusher**

- 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

- **controller_controls_mine:** Bruce S  Goodrich et al → Cedar Rapids Crusher; 2013-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R&E Enterprises of Mankato Inc → Cedar Rapids Crusher; 2021-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce S  Goodrich et al → R&E Enterprises of Mankato Inc; 2021-03-16 to current/open; source msha-controller-operator-history