# Relationship history for MSHA mine 1515220

Current hierarchy: **Roger D  Barnette → Barnette Construction Inc → Barnette 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:** Saiah D & F Engleman → Barnette Surface; 1984-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winn Inc → Barnette Surface; 1985-05-01 to 1985-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Walter R  Neese et  al → Barnette Surface; 1985-05-01 to 1985-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Walter R  Neese et  al → Winn Inc; 1985-05-01 to 1985-10-28; source msha-controller-operator-history
- **operator_operates_mine:** B X Corp → Barnette Surface; 1985-10-29 to 1986-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Saiah D & F Engleman → B X Corp; 1985-10-29 to 1986-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Barnette Construction Inc → Barnette Surface; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger D  Barnette → Barnette Surface; 1986-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger D  Barnette → Barnette Construction Inc; 1986-11-04 to current/open; source msha-controller-operator-history