3-Final_Geotech_Report_-_Site_5B-3_43rd_Avenue_S_encrypted.pdf

This is a Geotechnical Report prepared for Site 5B-3 located at 43rd Avenue South in the Mount Baker Neighborhood of Seattle, Washington, as part of the Water Main Rehab Package 5B project administered by the City of Seattle. The project encompasses water main improvements, stormwater and erosion control, demolition, storm drain improvements, excavation dewatering systems, trench dam installation to prevent methane gas travel, contaminated and non-hazardous soil and water handling and disposal, and pavement restoration including ADA ramps across six sites within Seattle. The engineer's estimate for the entire project is $5,600,000 before sales tax. This is a Covered Project subject to the City of Seattle's Community Workforce Agreement and Priority Hire requirements under SMC 20.37, which provides workforce access to individuals from economically distressed communities, women, and people of color on city construction projects.

The geotechnical report provides subsurface investigation and analysis specific to Site 5B-3 to support design and construction planning for the water main rehabilitation work at this location. The report documents soil conditions, groundwater information, and recommendations for construction considerations such as excavation, dewatering, and trench stability—critical information for contractors bidding on this package. Funding for this project is provided by the City of Seattle's capital improvement program for water infrastructure rehabilitation. The project requires compliance with prevailing wage standards and community workforce agreement requirements, reinforcing the city's commitment to equitable contracting practices and skilled workforce development in the construction sector.