# Relationship history for MSHA mine 3401145

Current hierarchy: **Delaware County - Ok → Delaware County → District #2**

- 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

- **operator_operates_mine:** Roy Downing → District #2; 1978-03-09 to 1990-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Downing Roy → District #2; 1978-03-09 to 1990-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Downing Roy → Roy Downing; 1978-03-09 to 1990-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Delaware County - Ok → District #2; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Delaware County → District #2; 1990-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Delaware County - Ok → Delaware County; 1990-08-09 to current/open; source msha-controller-operator-history