# Relationship history for MSHA mine 3610452

Current hierarchy: **Robert  Heed → CBH Investments LLC → Thompson-Shager**

- 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:** Robert  Heed → Thompson-Shager; 2020-10-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CBH Investments LLC → Thompson-Shager; 2024-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Heed → CBH Investments LLC; 2024-09-05 to current/open; source msha-controller-operator-history