# Relationship history for MSHA mine 0504947

Current hierarchy: **The Watley Group LLC → Caldera Mineral Resources, LLC → Camp Bird Mine**

- 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

- **controller_controls_mine:** Federal Resources Corp → Camp Bird Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camp Bird Colorado, Inc. → Camp Bird Mine; 2011-07-21 to 2012-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Federal Resources Corp → Camp Bird Colorado, Inc.; 2011-07-21 to 2012-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Caldera Mineral Resources, LLC → Camp Bird Mine; 2012-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The Watley Group LLC → Camp Bird Mine; 2012-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Watley Group LLC → Caldera Mineral Resources, LLC; 2012-08-14 to current/open; source msha-controller-operator-history