Summary of Geotech Report

This is a Geoechnical Report prepared for the City of Seattle's Water Main Rehab Package 5B project, specifically addressing Site 5B-5 in the Fauntleroy neighborhood. The report provides subsurface soil and geological conditions analysis necessary for the design and construction planning of water main improvements along 50th Avenue SW from 50th Avenue SW to SW 98th Street. The project encompasses six sites across Seattle neighborhoods (Phinney Ridge, North Queen Anne, Mount Baker, South Beacon Hill, and Fauntleroy) with an Engineer's Estimate of $5,600,000 before sales tax. Construction work includes new 6" to 12" ductile iron pipe installation, gate valves, pressure reducing stations, storm drain improvements, water main service connections, excavation dewatering systems, trench dams to prevent methane gas travel, contaminated and non-hazardous soil and water handling and disposal, and pavement restoration including ADA ramps.

The project is designated as a Covered Project subject to the City of Seattle's Community Workforce Agreement (CWA) and Priority Hire Program under Seattle Municipal Code 20.37, which provides employment opportunities for residents of economically distressed communities, women, and people of color on city construction projects. The geoechnical report supports compliance with project requirements by documenting subsurface conditions at Site 5B-5 (Fauntleroy Protected), enabling contractors to properly plan excavation, dewatering, and trench safety measures while managing potential environmental considerations including methane gas and contaminated soil handling.