# Relationship history for MSHA mine 4300597

Current hierarchy: **Sherri  Tucker → RE Tucker Inc → Road Runner 5x12 Screen**

- 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:** Ronald E  Tucker et al → Road Runner 5x12 Screen; 1986-05-06 to 2020-02-27; source msha-controller-operator-history
- **operator_operates_mine:** RE TUCKER INC → Road Runner 5x12 Screen; 2003-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Tucker et al → RE TUCKER INC; 2003-08-05 to 2020-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Sherri  Tucker → Road Runner 5x12 Screen; 2020-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sherri  Tucker → RE TUCKER INC; 2020-02-28 to current/open; source msha-controller-operator-history