# Relationship history for MSHA mine 4801048

Current hierarchy: **Kurt  Croell → Croell, Inc. → Douglas Wash Plant**

- 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:** Menter Construction Company → Douglas Wash Plant; 1950-01-01 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Menter Construction Company → Douglas Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Menter Construction Company → Menter Construction Company; 1950-01-01 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Croell → Douglas Wash Plant; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Menter Construction Company → Douglas Wash Plant; 1979-01-01 to 2002-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Menter Sand & Gravel → Douglas Wash Plant; 2002-02-01 to 2008-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Menter Construction Company → Menter Sand & Gravel; 2002-02-01 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Loftin → Douglas Wash Plant; 2002-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Loftin → Menter Sand & Gravel; 2002-02-01 to 2008-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → Douglas Wash Plant; 2008-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 2008-03-29 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → Douglas Wash Plant; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2014-01-01 to current/open; source msha-controller-operator-history