# Relationship history for MSHA mine 3606363

Current hierarchy: **Donald  Miller; Dennis E  Bence → Twin Brook Coal Company → Cherry Tree #1**

- 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:** Twin Brook Coal Company → Cherry Tree #1; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis E  Bence et al → Cherry Tree #1; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis E  Bence et al → Twin Brook Coal Company; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Miller et al → Twin Brook Coal Company; 1977-04-01 to current/open; source msha-controller-operator-history