# Relationship history for MSHA mine 0405908

Current hierarchy: **Kurt  Caillier; Randy  Caillier → Coast Aggregates → Coast Aggregates Big Rock Creek**

- 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:** Coast Aggregates → Coast Aggregates Big Rock Creek; 2016-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Caillier et al → Coast Aggregates Big Rock Creek; 2016-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Caillier et al → Coast Aggregates; 2016-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Caillier et al → Coast Aggregates; 2016-01-19 to current/open; source msha-controller-operator-history