TranTech Engineering LLC 1/31/2020

City of Everett Edgewater Creek Bridge Replacement Exhibit "A" SCOPE OF WORK Background: This project will replace the existing City of Everett's(City)Edgewater Creek Bridge in Mukilteo Blvd. corridor with a new multi-span bridge. The Bridge constructed in 1946, is a vital link in a chain of three bridges that provide the only access to neighborhoods located along the Mukilteo Boulevard, an NHS route between the cities of Everett and Mukilteo. The other two bridges are Maple Heights(SID 08560500) and Merrill & Ring(SID 08560600) and both have projects proposed to deal with existing deficiencies. The Mukilteo Boulevard traverses deep ravines and winds along steep hillsides and is the only access to the neighborhoods along its length. It also serves over 6000 vehicles per day in its load restricted condition. If any two of these three bridges were to fail during a seismic event there is no other access to the areas isolated by the bridge failures. The existing structure is a 5-span 352 feet(52':78.5':91':78.5: 52') and 37 feet wide (26' curb- to-curb)cast-in-place non-redundant two girder concrete tee-beam bridge that is deficient in both shear and deck design demand load bearing capacity. The deck was designed for H-15 loading and is showing signs of distress under modern loads, even with its load posted status. The bridge is not only at risk seismically but is also functionally obsolete with its narrow traffic lanes and narrow sidewalks. The physical condition of this bridge has been deteriorating in recent years and requires constant maintenance and occasional closures. Replacement alignment/s of the existing bridge will be based on considerations of the environmental process determinations,right-of-way,mobility of traffic and other City-desired goals that will be determined during the important Type, Size, & Location(TS&L) investigation phase of the project. The work will include project management inclusive of project scoping, multi-agency coordination, utility coordination, and preliminary design, final design, and construction phases. It is assumed that the City will lead the Right-of-way activities. The City,at its discretion,may elect to include to amend the consultant's contract to include partial or full construction engineering services, which may include construction phase engineering support and inspection for federally funded projects. Furthermore,the City,at its discretion,may elect to amend the consultant's contract to include the design and construction phase engineering support and inspection of the Merrill & Ring Bridge replacement as well,due to its similarity to the Edgewater Creek Bridge Replacement Project. Initial Scope Summary: Page 1 of 42