# Relationship history for MSHA mine 0203442

Current hierarchy: **Bryant R Smith → Smithco Enterprises Inc → Smithco Portable 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:** Judy E  Smith → Smithco Portable 2; 1999-03-01 to 2017-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Bryant R Smith → Smithco Portable 2; 2017-01-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Smithco Enterprises Inc → Smithco Portable 2; 2021-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryant R Smith → Smithco Enterprises Inc; 2021-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Judy E  Smith → Smithco Enterprises Inc; 2021-03-05 to 2017-01-03; source msha-controller-operator-history