# Relationship history for MSHA mine 0203165

Current hierarchy: **Summit Materials LLC → Arizona Materials → Buckeye 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

- **controller_controls_mine:** Harold  Elam → Buckeye Plant; 1950-01-01 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Arms Length Investors LLC  et al → Buckeye Plant; 2004-02-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arizona Materials LLC → Buckeye Plant; 2007-03-27 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Arms Length Investors LLC  et al → Arizona Materials LLC; 2007-03-27 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_operator:** DBJ Enterprises LLC  et al → Arizona Materials LLC; 2007-03-27 to 2023-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → Buckeye Plant; 2011-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arizona Materials → Buckeye Plant; 2023-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Elam → Arizona Materials; 2023-06-19 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → Arizona Materials; 2023-06-19 to current/open; source msha-controller-operator-history