# Relationship history for MSHA mine 0504044

Current hierarchy: **Don L  Gosney → Gosney & Sons Inc → Gosney 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:** Gosney & Sons Inc → Gosney Crusher; 1985-05-01 to 1996-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Don L  Gosney → Gosney Crusher; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don L  Gosney → Gosney & Sons Inc; 1985-05-01 to 1996-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → Gosney Crusher; 1996-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile Four Corners Division → Gosney Crusher; 1996-06-07 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Western Mobile Four Corners Division; 1996-06-07 to 1998-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile Four Corners Division → Gosney Crusher; 1998-02-11 to 1999-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Gosney Crusher; 1998-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Western Mobile Four Corners Division; 1998-02-11 to 1999-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Gosney & Sons Inc → Gosney Crusher; 1999-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don L  Gosney → Gosney & Sons Inc; 1999-06-15 to current/open; source msha-controller-operator-history