Eastmont Extension Mainline (Badger Mountain Rd to SR2/28) -  Project Summary

Introduction
The Eastmont Extension project is Douglas County’s portion of Alternative 3B as defined in the Washington State Department of Transportation’s (WSDOT) SR 28 (Sunset Highway) Eastside Corridor Project Environmental Impact Statement (EIS). The EIS defines Alternative 3B as the Preferred Alternative and cleared the way for the funding, design, and construction of the seven stages of this regionally significant transportation improvement project. Stage 1, which includes work to be completed by both Douglas County and WSDOT, is the only Stage funded thus far and is currently in the design and construction phase. The County’s portion of Stage 1 is identified as the Eastmont Extension project. The Eastmont Extension project has been partitioned into seven contracts that are to be constructed over the course of four years, from 2009 to 2013. The projects constructed to date and planned for construction in the next several years include the following:

35th St NW and 38th St NW Canal Crossing Improvements
The first contract was awarded to Hurst Construction, LLC and was completed during the 2008/2009 winter season. The project included the replacement of the existing canal culvert at 38th St NW and the widening of the canal bridge at 35th St NW. The canal crossings were widened to accommodate the Douglas County Urban Collector standards with curb, gutter, and sidewalk on both sides of the roadway.

35th St NW 38th St NW Improvements
The second contract was awarded to Selland Construction in 2009. The project included reconstruction of 35th St NW from NW Cascade Ave to SR 28 and of 38th St NW from Cascade Avenue NW to SR 2/97. The roadways were designed to Douglas County Urban Collector standards with curb, gutter, and sidewalk on both sides of the roadway. A minimum of 60 feet of right-of-way was required to accommodate a curb-to-curb roadway width of 44 feet. Vicinity Map      Bid Comparison

31st St Canal Crossing
The third contract was awarded to J&K Earthworks, LLC and was completed during the 2009/2010 winter season. The project included the replacement of the existing canal culvert at 31st St NW and the installation of a section of 72-inch corrugated metal drain pipe.

Canyon B Bridge
The contract was awarded to Cascade Bridge for construction starting summer 2010 to completion early 2012. The project includes the construction of a 597-foot bridge across Canyon B at the location of the future extension of Eastmont Avenue. The bridge consists of a 250-foot concrete arch with five equal spans of WSDOT standard W58G girders. Approaches to the arch consist of 112-foot and 100-foot girder spans on the north and 100-foot and 35-foot girder spans on the south end of the bridge. Girders will be installed May and June, arch span girders installed after concrete curing is complete for the arch. A seven girder system with a 9-inch concrete deck will provide a 50-foot roadway cross section. A 6-foot pedestrian sidewalk will be included on the east side of the bridge and concrete barriers with railing will be constructed on both sides of the bridge. Amount of concrete used for this bridge can complete 7.5 miles of sidewalk.

31st St Drainage - Phase 1
The fifth contract was awarded to Pipkin Construction and will include installation of a 72-inch diameter corrugated metal drain pipe along 31st Street from NE Vine Street below the mouth of Canyon B to NW Cascade Avenue. The project will also include improvements to other small stormwater facilities associated with later phases of the Eastmont Extension project.

31st St Drainage – Phase 2
The sixth contract is planned for construction in 2011 and will include installation of a 72-inch diameter corrugated metal drain pipe from the intersection of 31st St and NW Cascade intersection to the Columbia River.

Eastmont Extension Mainline – Badger Mountain Rd to SR 2/28
The seventh and final contract to be let by Douglas County is planned for construction in 2012 and will include construction of a new alignment that will extend Eastmont Avenue from Badger Mountain Road to the intersection of SR 28 and SR 2/97. The roadway will be constructed to Urban Arterial road standards with a 50-foot wide traveled way and curb and gutter on both sides of the roadway. Sidewalk will be constructed along the eastern side of the roadway. The western side of the roadway will have long runs of guardrail and retaining walls with color and finish selected to match the existing wall along Eastmont Avenue to the south. The new road north of the bridge will include a climbing lane for southbound traffic. Intersection along the alignment will be designed with left turn lanes to maintain efficient traffic flow and maximize vehicle capacity. Project Overview (125mb - 36" x 126")

Benefits
Completion of the projects above will benefit the traveling public in a number of ways. A completed Eastmont Extension will provide an additional north-south arterial connecting the northern and southern ends of the Wenatchee Valley. This will improve levels of service throughout the Wenatchee Valley by providing vehicles using existing congested areas an alternate route of travel. The new roadway will provide an alternate route to residences on the Fancher Plateau and improve access to the area by emergency services. Finally, as envisioned by the SR 28 Eastside Corridor project, completion of the Eastmont Extension arterial will reduce traffic loads on SR 28 and thereby facilitate construction by the WSDOT of Stages 2 through 8 of the Eastside Corridor project.