# Relationship history for MSHA mine 0504119

Current hierarchy: **CRH PLC → Four Corners Materials → FCM Rental Crusher**

- 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:** Noland Inc → FCM Rental Crusher; 1986-02-01 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Noland → FCM Rental Crusher; 1986-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Noland → Noland Inc; 1986-02-01 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → FCM Rental Crusher; 1998-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Southern Ute Indian Tribe → FCM Rental Crusher; 2004-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sky Ute Sand & Gravel, LLC → FCM Rental Crusher; 2005-01-01 to 2023-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Southern Ute Indian Tribe → Sky Ute Sand & Gravel, LLC; 2005-01-01 to 2023-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Four Corners Materials → FCM Rental Crusher; 2023-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Four Corners Materials; 2023-06-29 to current/open; source msha-controller-operator-history