# Relationship history for MSHA mine 2602486

Current hierarchy: **Wes  Adams → Western States Contracting, Inc. → Durango 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

- **controller_controls_mine:** Wes  Adams → Durango Pit; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western States Contracting, Inc. → Durango Pit; 2002-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wes  Adams → Western States Contracting, Inc.; 2002-02-07 to current/open; source msha-controller-operator-history