# Relationship history for MSHA mine 4801815

Current hierarchy: **Matthew G  Henry → C & H Cowboy Construction LLC → #1 Screen**

- 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:** C & H Cowboy Construction LLC → #1 Screen; 2018-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew G  Henry → #1 Screen; 2018-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew G  Henry → C & H Cowboy Construction LLC; 2018-07-23 to current/open; source msha-controller-operator-history