# Relationship history for MSHA mine 1700992

Current hierarchy: **Gary L Dunphy → Woodpecker Logging, Inc. → LEXINGTON PIT**

- 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

- **operator_operates_mine:** Woodpecker Logging, Inc. → LEXINGTON PIT; 2017-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary L Dunphy → LEXINGTON PIT; 2017-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary L Dunphy → Woodpecker Logging, Inc.; 2017-09-20 to current/open; source msha-controller-operator-history