# Relationship history for MSHA mine 1901245

Current hierarchy: **CMC → LM Heavy Civil Construction, LLC → Overlook Road**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** LM Heavy Civil Construction, LLC → Overlook Road; 2014-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CMC → Overlook Road; 2014-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CMC → LM Heavy Civil Construction, LLC; 2014-04-03 to current/open; source msha-controller-operator-history