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CHAPTER 2: RANGE OF ALTERNATIVES <br />2.3 Alternative 2: Widen <br />1-90 in the Median <br />Alternative 2 would widen 1-90 on the inside to <br />add one new lane in each direction. Existing <br />lane widths would not change, nor would the <br />existing outside shoulder. The median would <br />be used for the two new lanes and a new inside <br />shoulder; the new lanes would be 12 feet wide <br />with a new inside shoulders of 4 to 10 feet (in <br />both directions). <br />The new roadway would result in three lanes <br />in each direction. Most of the land required for <br />expansion is located within the existing WSDOT <br />right-of-way. <br />Figure 2-3 presents the general alignment for <br />Alternative 2. Figure 2-5 shows a perspective <br />cross-section of the proposed alternative. <br />Considerations <br />• Widening would occur within existing <br />WSDOT right of way (median). <br />• Additional median barriers/cable barriers <br />would be required due to the reduction in <br />the clear zone. <br />• Interior existing lanes would need to be <br />replaced to change the cross slope of the <br />road to drain to the outside. <br />• Median width would be decreased, <br />possibly interfering with current WSDOT <br />maintenance and emergency vehicle use. <br />• Property impacts to Washington State <br />Department of Fish and Wildlife at MP 79.1 <br />due to realignment. <br />• Both Cle Elum River Bridges 90/134N and <br />90/134S would need to be replaced at MP <br />80.85. <br />• This alternative assumes the replacement <br />of all culverts and stream structures to the <br />current requirements for fish or hydraulic <br />demand. <br />• Widening towards the outside would still <br />be required in select locations to avoid <br />larger impacts. <br />• This option presents the least risk of <br />affecting or necessitating the replacement <br />of the current bridges spanning the <br />1-90 corridor. The center barrier would <br />be constructed around the existing <br />center piers. However, it's important to <br />acknowledge that many of the bridges in <br />this corridor are approaching the end of <br />their designed lifespans and might require <br />replacement regardless of efforts to avoid <br />impacts. <br />• This option provides the ability for WSDOT <br />Maintenance and/or contractors to close <br />a single lane on 1-90 during daytime hours <br />and maintain two lanes of traffic. <br />VOLUME 1: FEASIBILITY REPORT 1-90 Corridor Easton to Cle Elum Feasibility Study 1 14 <br />