# Relationship history for MSHA mine 5000469

Current hierarchy: **Gene  Cheeseman → G.R. Cheeseman Construction → Portable Operation**

- 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:** Gastineau Contractors → Portable Operation; 1950-01-01 to 2022-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Smith Joe M Sr → Portable Operation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Joe M Sr → Gastineau Contractors; 1950-01-01 to 2022-02-21; source msha-controller-operator-history
- **operator_operates_mine:** G.R. Cheeseman Construction → Portable Operation; 2022-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gene  Cheeseman → Portable Operation; 2022-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gene  Cheeseman → G.R. Cheeseman Construction; 2022-02-22 to current/open; source msha-controller-operator-history