Sound Transit employees are lowered Wednesday into the main shaft of the Beacon Hill Light Rail Station, which is being built at Beacon Avenue South and South Lander Street in Seattle.
At 150 feet deep, it will house four high-speed elevators. The tunnel station will have a second shaft for ventilation and emergency access.
The station is in the middle of a one-mile long tube connecting Rainier Valley with the Sodo area.
The digging should be completed by 2008, and the trains are scheduled to begin running in 2009.
Sound Transit expects 3,000 people will be boarding the trains at the Beacon Hill Station by 2020.