# Relationship history for MSHA mine 3503796

Current hierarchy: **Clint Douglas  Woodward → CLINT WOODWARD CONSTRUCTION LLC → PORTABLE CRUSHER**

- 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:** Clint Woodward Construction LLC → PORTABLE CRUSHER; 2013-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clint Douglas  Woodward → PORTABLE CRUSHER; 2013-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint Douglas  Woodward → Clint Woodward Construction LLC; 2013-05-22 to current/open; source msha-controller-operator-history