# Relationship history for MSHA mine 2402454

Current hierarchy: **Kathleen K Remp → Remp Sand & Gravel Inc → Crusher #2**

- 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:** Ronald  Remp et al → Crusher #2; 1999-08-02 to 2018-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Remp Sand & Gravel Inc → Crusher #2; 2006-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Remp et al → Remp Sand & Gravel Inc; 2006-06-22 to 2018-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Remp et al → Remp Sand & Gravel Inc; 2006-06-22 to 2018-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Kathleen K Remp → Crusher #2; 2018-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathleen K Remp → Remp Sand & Gravel Inc; 2018-06-13 to current/open; source msha-controller-operator-history