UPDATED - Oct. 24, 2013
Water infiltration testing in Montlake area
Beginning in late October, a small crew will dig two pits and use water to test soil properties along East Park Drive, just north of the former Museum of History & Industry site. Each pit will be dug with construction equipment and filled with water. Using water from a nearby water source, crews will continuously add water to the test pits for approximately 6 - 17 hours. Field staff will monitor the work during testing. Once the test is complete, the pits will be backfilled. Temporary fencing will be installed, as needed. Pedestrian and vehicle access will be maintained.
For more information and a detailed flyer, check out our post on the SR 520 Orange Page.
Crews conduct geotechnical fieldwork investigations near SR 520 in Seattle
Beginning on Monday, Aug. 26, crews are performing geotechnical and utility line investigations near SR 520 in the Montlake area. Work will occur on weekdays between 7 a.m. and 6 p.m. and on weekends between 9 a.m. and 6 p.m. All work will take place on WSDOT right of way or city streets.
The work provides valuable information to WSDOT engineers to support design of the next phase of construction, the West Approach Bridge North.
Geotechnical equipment used during the work will sound similar to background noise from the highway, with a hammering sound during soil sampling.
For more information, read our notification flyer. (pdf 434 kb)
Site studies and survey work continue at Union Bay Natural Area
WSDOT is working with the University of Washington on site studies and survey work to move forward with an SR 520-related mitigation project at the Union Bay Natural Area.
During the work, crews periodically collect data from monitoring wells near the parking area. The data collected provides a better understanding of the soil and groundwater conditions at the site. The wells will be in place through summer 2014.
Crews are continuing to collect data from geotechnical monitoring wells in the Seattle area of the SR 520, I-5 to Medina: Bridge Replacement and HOV Project. These wells are part of an ongoing geotechnical study of soil and groundwater conditions. The information gathered helps us better understand the composition and characteristics of the ground in this area, which is vital to continuing structural engineering design and completing future SR 520 improvements in the area.
In April 2013, WSDOT began performing geotechnical investigations in the Union Bay Natural Area. Crews took soil samples and installed monitoring well equipment in and around the parking area to study soil and groundwater conditions to prepare for future wetland mitigation work. Read our public notice for more information.