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Highway 280 and Broadway Interchange Comparison of Alternatives January 10, 2002 Page 2 on the roadway. It is anticipated that Highway 280 will be lowered slightly and the bridge over and the ramps will be at a higher elevation than existing. Thus, the distance between the railroad tracks and the southbound ramp intersection will be critical. The Central Alternate has a distance of 430 feet while the East Alternate e�tends this to 450 feet. The West Alternate has only 320 feet. Thus, a significant grade or additional lowering of the Highway 280 grade will be required with the West Alternate. � Design of the ramp intersections, distance between the ramps and access to properties to the north and south are not significantly different between the three alternates. Property Impacts A major consideration is the impact on properties as a result of the construction of ramps. Although the concepts are preliminary, some evaluation of the impacts can be made from them. In the southeast comer, there are five homes in the first block north of Roselawn Avenue on the west side of Walnut Street. The Central Alternate would impact the first two homes on the north and the yards from the other three homes further to the south. The East Alternate would impact the four northerly homes and the yard on the fifth home. The West Alternate would impact the yard of the northerly-most home but not impact the remaining four homes. The West Alternate would also place the roadway approximately 100 feet further west from the intersection of Walnut Street and Ryan Avenue compared to the Central Alternate. The East Alternate would place it 30 feet further to the east. In the northeast comer, the biggest impact obviously is to the golf course fairway. The Central Alternate would move the fence approximately 10 feet closer to the golf course at the critical comer, while the East Alternate would move it 30 feet and the West Alternate would not require moving it. This is based strictly on a preliminary concept of the ramp alignment and does not take into account any drainage, construction easement or utility needs. It may be possible to reduce the impact through slopes and retaining walls. In the northwest quadrant, two buildings in the Pacal development could be impacted. The southeast building would be touched by any of the ramps in a11 three alternates. The Central Alternate would impact appro�mately 200 feet of the building, which means the southerly 200 feet of the building would ha�e to be removed, obviously ha�ing an impact on the entire building. The East Alternate reduces this impact to 100 feet of building. The West Alternative has a 320-foot impact or virtually impacting the entire building. Two of the ramp alternates also impact the main PaCal building. The Central Alternate gets quite close and would require a notch of 30' by 100' or some very innovative restructuring of the building and retaining wa11 construction on the ramp and main line of Highway 280. The West Alternate impacts it significantly more by creating a 50' x 100' impact. The East Alternate does not require any change to the main building.