# Relationship history for MSHA mine 3102077

Current hierarchy: **Colorado Yule & Monpetra → White Camellia Granite Company → White Camellia Granite Company**

- 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:** White Camellia Granite Company → White Camellia Granite Company; 1991-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Colorado Yule & Monpetra → White Camellia Granite Company; 1991-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colorado Yule & Monpetra → White Camellia Granite Company; 1991-07-01 to current/open; source msha-controller-operator-history