IMMERSED TUNNEL

Crunch Time Aproaches On SR 520 Bridge Replacement

The Washington State Department Of Transportation authorized a preliminary consultant inquiry – recently completed – into the feasibility of a tunnel to replace the congested, dangerously earthquake-prone and windstorm-prone State Route 520 Floating Bridge across Lake Washington from Seattle to the Eastside. It’s one of just two bridges across the 22-mile long lake, and the jammed, 60s-vintage four-laner carries 155,000 to 160,000 people per day. The odds-on favorite to replace it is……a new, wider and safer floating bridge. However, well-heeled communities at both ends have strong concerns about bridge-related noise and air pollution, and on the Seattle side, about current roadway impacts on the Washington Park Arboretum. These concerns could translate into expensive mitigation measures attached to a new bridge, Read More ›