# Relationship history for MSHA mine 0302094

Current hierarchy: **Christopher R Yerkes → Black Bear Cove Mining & Lapidary LLC → BlueGill**

- 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:** Black Bear Cove Mining & Lapidary LLC → BlueGill; 2024-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher R Yerkes → BlueGill; 2024-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher R Yerkes → Black Bear Cove Mining & Lapidary LLC; 2024-12-17 to current/open; source msha-controller-operator-history