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CHAPTER 2: RANGE OF ALTERNATIVES 2.2 Alternative 1: Widen • Median would stay intact, allowing for 1-90 on the Outside continued use for WSDOT maintenance. • Both Cie Elum River Bridges 90/134N and Alternative 1 would widen 1-90 on the outside 90/134S would need to be replaced at MP to add one new lane in each direction. Existing 80.85. lane widths would not change, nor would the . Widening towards the median would still existing median and inside shoulder. The new be required to locations to avoid larger lane would be 12 feet wide with a new outside impacts. shoulder of 10 feet(in both directions) and . Most existing bridges spanning over the inside shoulders of 4 to 10 feet. 1-90 corridor would need to be replaced. The new roadway would result in three lanes • This alternative assumes the replacement in each direction. Most of the land required of all culverts and stream structures to the for expansion is located within existing WSDOT current requirements for fish or hydraulic right-of-way,though some additional property demand. will be required. • Stormwater treatment facilities may require Figure 2-3 presents the general alignment for additional property needs due to reduction Alternative 1 (as well as Alternatives 2 and of width in the right of way. 3, presented later in this chapter). Figure 2-4 • This option provides the ability for WSDOT shows a perspective cross-section of the Maintenance and/or contractors to close proposed alternative. a single lane on 1-90 during daytime hours and maintain two lanes of traffic. Considerations • Widening would occur primarily within existing WSDOT right-of-way. • Some private property impacts would occur at MP74. • Property impacts to Washington State Department of Fish and Wildlife at MP 79.1 due to realignment. VOLUME 1: FEASIBILITY REPORT 1-90 Corridor Easton to Cle Elunn Feasibility Study 1 11