The Washington State Department of Transportation is moving forward with the State Route 520, I-5 to Medina: Bridge Replacement and HOV Project.
The Washington State Department
of Transportation (WDOT) is moving forward with the State Route (SR) 520, I-5
to Medina: Bridge Replacement and HOV (high occupancy vehicle) Project. This
effort will replace the SR 520 floating bridge, approaches, roadway and
interchanges from I-5 to the eastern shore of Lake Washington.
WDOT has been continuing the
in-water portion of geotechnical investigations of the areas surrounding the
planned bridge structures west of the floating bridge, and should have them
completed in a couple weeks (in-water and on-land investigations began in
2011). This portion of the in-water study provides valuable information to
engineers and contractors as they design foundations for the new bridges. A
small crew will use a drill rig mounted on a barge to complete the work.
The drill rig will
sound similar to background noise from the highway. Area residents also may hear
an occasional hammering sound during soil sampling. When in use, the noise
generated by the soil-sampling equipment may reach up to 70 decibels, which is
similar to the noise levels of highway traffic when standing approximately 50 feet
away. All work will occur during daylight hours.
On the Job: Bridge Replacement Project
August 22, 2012