ELLEN M. BANNER / THE SEATTLE TIMES
Workers use a technique called hydroplasty, which is similar to pressure washing, but just with more psi, on a retaining wall on the north side of Mercer Street, just west of Aurora Ave. N. in Seattle Friday morning. According to the Seattle Department of Transportation website, "Mercer West construction began in April 2013. Mercer West will complete the City's vision for a direct, two-way connection between I-5 and Elliott Ave. West continuing the segment of work constructed by the Mercer East Project. Along with new crossings of Aurora Avenue provided by the Alaskan Way Viaduct Replacement Program, it will greatly enhance the connection between the South Lake Union urban center and the Uptown urban center, including Seattle Center."