# Relationship history for MSHA mine 4609038

Current hierarchy: **James O  Bunn; Franklin D  Robertson → Wayco Limited Partnership No. 1 → No. 4**

- 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:** Franklin D  Robertson  et al → No. 4; 1992-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hi-Tech Construction Co Inc → No. 4; 2004-05-05 to 2004-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Carl D  Runyon → No. 4; 2004-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl D  Runyon → Hi-Tech Construction Co Inc; 2004-05-05 to 2004-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Wayco Limited Partnership No. 1 → No. 4; 2004-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Franklin D  Robertson  et al → Wayco Limited Partnership No. 1; 2004-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James O  Bunn  et al → Wayco Limited Partnership No. 1; 2004-08-17 to current/open; source msha-controller-operator-history