# Relationship history for MSHA mine 0302029

Current hierarchy: **Steve R  Hackman → Tutle and Tutle Trucking → T & H 6**

- 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:** Steve R  Hackman et al → T & H 6; 2010-11-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tutle and Tutle Trucking → T & H 6; 2012-02-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve R  Hackman et al → Tutle and Tutle Trucking; 2012-02-29 to current/open; source msha-controller-operator-history