I-90 Keechelus Dam to Stampede Pass Phase 2A is an improvement project of 2.5 miles of I-90 on Snoqualmie Pass from the Keechelus Dam vicinity to the Stampede Pass interchange. The project increases capacity and improves safety by adding a new lane in each direction, replacing concrete pavement, stabilizing rock slopes, building wildlife crossings, straightening the roadway, and adding a new chain-up area.