# Relationship history for MSHA mine 3503945

Current hierarchy: **Christopher Robert  Cameron → Crc construction llc → Dark canyon**

- 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:** Crc construction llc → Dark canyon; 2023-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher Robert  Cameron → Dark canyon; 2023-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher Robert  Cameron → Crc construction llc; 2023-05-06 to current/open; source msha-controller-operator-history