# Relationship history for MSHA mine 1518930

Current hierarchy: **Russell J  Honeycutt; Tommy L  McKenzie → R & T Coal Company Inc. → #1 Surface**

- 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:** Tommy L  McKenzie et al → #1 Surface; 2002-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arlie O  Daniels → #1 Surface; 2003-12-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dancoal Inc → #1 Surface; 2005-10-03 to 2006-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Arlie O  Daniels → Dancoal Inc; 2005-10-03 to 2006-05-03; source msha-controller-operator-history
- **operator_operates_mine:** R & T Coal Company Inc. → #1 Surface; 2006-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tommy L  McKenzie et al → R & T Coal Company Inc.; 2006-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell J  Honeycutt et al → R & T Coal Company Inc.; 2006-05-04 to current/open; source msha-controller-operator-history