# Relationship history for MSHA mine 0503545

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Dallas Creek Project**

- 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:** Granite Construction Inc → Dallas Creek Project; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dunn Jim E → Dallas Creek Project; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Construction Company → Dallas Creek Project; 1980-04-01 to 1982-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Dunn Jim E → Green Construction Company; 1980-04-01 to 1982-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Dallas Creek Project; 1982-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 1982-11-09 to current/open; source msha-controller-operator-history