# Relationship history for MSHA mine 3004134

Current hierarchy: **Gary  Hill → Union Concrete and Construction Corp. → KCI JCI Jaw SN: 416212**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Union Concrete and Construction Corp. → KCI JCI Jaw SN: 416212; 2024-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Hill → KCI JCI Jaw SN: 416212; 2024-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Hill → Union Concrete and Construction Corp.; 2024-06-26 to current/open; source msha-controller-operator-history