# Relationship history for MSHA mine 4202133

Current hierarchy: **Tyler  Clements; Doug  Clements → American Eagle Ready Mix Utah LLC → AE Portable 01**

- 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:** G W Johansen Construction Company Inc → AE Portable 01; 1996-05-01 to 2011-10-03; source msha-controller-operator-history
- **controller_controls_mine:** George  Johansen → AE Portable 01; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Johansen → G W Johansen Construction Company Inc; 1996-05-01 to 2011-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Central Asphalt Sand & Gravel → AE Portable 01; 2011-10-04 to 2023-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Bringhurst et al → AE Portable 01; 2011-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Bringhurst et al → Central Asphalt Sand & Gravel; 2011-10-04 to 2023-04-24; source msha-controller-operator-history
- **controller_controls_operator:** B Maray  Bringhurst et al → Central Asphalt Sand & Gravel; 2011-10-04 to 2023-04-24; source msha-controller-operator-history
- **operator_operates_mine:** American Eagle Ready Mix Utah LLC → AE Portable 01; 2023-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tyler  Clements et al → AE Portable 01; 2023-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler  Clements et al → American Eagle Ready Mix Utah LLC; 2023-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Clements et al → American Eagle Ready Mix Utah LLC; 2023-04-25 to current/open; source msha-controller-operator-history