# Relationship history for MSHA mine 2902135

Current hierarchy: **Lafarge S A → Western Mobile Four Corners Division → NM WASH PLT #2-PLT #1201**

- 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:** Don L  Gosney → NM WASH PLT #2-PLT #1201; 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gosney & Sons Inc → NM WASH PLT #2-PLT #1201; 1994-07-01 to 1996-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Don L  Gosney → Gosney & Sons Inc; 1994-07-01 to 1996-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile Four Corners Division → NM WASH PLT #2-PLT #1201; 1996-05-08 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → NM WASH PLT #2-PLT #1201; 1996-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Western Mobile Four Corners Division; 1996-05-08 to 1998-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile Four Corners Division → NM WASH PLT #2-PLT #1201; 1998-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → NM WASH PLT #2-PLT #1201; 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 current/open; source msha-controller-operator-history