# Relationship history for MSHA mine 1001677

Current hierarchy: **Daryl G  Turner → A & T Mining → John Day Placer**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Daryl G  Turner et al → John Day Placer; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & T Mining → John Day Placer; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daryl G  Turner et al → A & T Mining; 1985-05-01 to current/open; source msha-controller-operator-history