# Relationship history for MSHA mine 4104736

Current hierarchy: **Travis Ray  McCasland → BrazoStone → Mitchel Bend Plant**

- 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:** BrazoStone → Mitchel Bend Plant; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Travis Ray  McCasland → Mitchel Bend Plant; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis Ray  McCasland → BrazoStone; 2008-10-10 to current/open; source msha-controller-operator-history