# Relationship history for MSHA mine 4609059

Current hierarchy: **Carl D  Runyon → Hi-Tech Construction Co Inc → Refuse Area No. 2 Surface Mine**

- 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:** Carl D  Runyon → Refuse Area No. 2 Surface Mine; 2004-05-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hi-Tech Construction Co Inc → Refuse Area No. 2 Surface Mine; 2004-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl D  Runyon → Hi-Tech Construction Co Inc; 2004-08-05 to current/open; source msha-controller-operator-history