# Relationship history for MSHA mine 4200377

Current hierarchy: **CRH PLC → Staker & Parson Companies → Brigham City South 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Fife Rock Products Company Inc → Brigham City South Pit; 1950-01-01 to 2005-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Geneva  Fife → Brigham City South Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geneva  Fife → Fife Rock Products Company Inc; 1950-01-01 to 2005-05-24; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Brigham City South Pit; 2002-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Staker & Parson Companies → Brigham City South Pit; 2005-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Staker & Parson Companies; 2005-05-25 to current/open; source msha-controller-operator-history