# Relationship history for MSHA mine 2104084

Current hierarchy: **Cody T  Sibson → CT Sibson Gravel & Crushing Inc → Plant 4**

- 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:** Cody T  Sibson → Plant 4; 2018-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CT Sibson Gravel & Crushing INC → Plant 4; 2024-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cody T  Sibson → CT Sibson Gravel & Crushing INC; 2024-08-29 to current/open; source msha-controller-operator-history