University Link tunnel
A section of tunnel at Capitol Hill station | |
| Overview | |
|---|---|
| Line | 1 Line |
| Location | Seattle, Washington |
| Status | Active |
| Start | Downtown Seattle Transit Tunnel |
| End | University of Washington station |
| Operation | |
| Constructed | 2009–12 |
| Opened | March 19, 2016 |
| Owner | Sound Transit |
| Traffic | Link light rail |
| Technical | |
| Length | 3.15 mi (5.07 km) |
| No. of tracks | Double |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
| Tunnel clearance | 21 ft (6.4 m) |
| Width | 21 ft (6.4 m) |
The University Link tunnel is a 3.15-mile (5.07 km) light rail tunnel in Seattle, Washington, United States. The twin-bore tunnel carries Link light rail service on the 1 Line from the Downtown Seattle Transit Tunnel to University of Washington station via Capitol Hill station. It was constructed as part of the University Link Extension of Central Link (now the 1 Line) from 2009 to 2012. The 21 ft-wide (6.4 m) tunnels are lined with precast gasketed concrete segments connected with steel bolts and was excavated using three tunnel-boring machines in 2011 and 2012. Light rail service began on March 19, 2016.