# Relationship history for MSHA mine 4501882

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Circle T Ranch Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Granite Construction Inc → Circle T Ranch Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jarl Construction Company Inc → Circle T Ranch Pit; 1950-01-01 to 1980-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Norm  Jarl → Circle T Ranch Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norm  Jarl → Jarl Construction Company Inc; 1950-01-01 to 1980-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Mid Columbia Asphalt → Circle T Ranch Pit; 1980-03-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Albert E  DeAtley → Circle T Ranch Pit; 1980-03-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Albert E  DeAtley → Mid Columbia Asphalt; 1980-03-01 to 1986-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Mid Columbia Asphalt Company → Circle T Ranch Pit; 1986-07-15 to 2007-04-11; source msha-controller-operator-history
- **controller_controls_mine:** J Brian  Sims → Circle T Ranch Pit; 1986-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Brian  Sims → Mid Columbia Asphalt Company; 1986-07-15 to 2007-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Granite Northwest Inc → Circle T Ranch Pit; 2007-04-12 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Circle T Ranch Pit; 2007-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Northwest Inc; 2007-04-12 to 2011-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Circle T Ranch Pit; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2011-04-01 to current/open; source msha-controller-operator-history