Two people were hospitalized Saturday evening after a collision in Silverdale involving alcohol. The incident was reported at 9:43 p.m. of a vehicle that had struck a large maple tree on Ridgetop Boulevard, according to a report from the Kitsap County Sheriff’s Office. A 28-year-old Bremerton man was driving a 2004 Volvo north on Ridgetop Boulevard at a “high rate of speed” and failed to stop for a stop sign at the intersection of Ridgetop Boulevard and Avante Drive. The driver braked and the car skidded through the intersection into the center median on the road and struck the tree. The driver was with a 26-year-old Silverdale woman who was airlifted to Harborview Medical Center in Seattle and was listed in satisfactory condition Sunday. The man was transported to St. Joseph Hospital in Tacoma and was listed as in stable condition. The primary factors in the cause of the collision appear to be excessive vehicle speed and the driver’s consumption of alcohol, according to the report. People who witnessed the crash are asked to contact Deputy Dave Green in the sheriff’s traffic unit at (360) 337-4634.