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Bay Trail Connection The project also proposes to complete the 630- foot (192-meter) gap in the Bay Trail by widening the northern levee. The new trail has been designed to comply with applicable trail standards and to allow the continued use of the levee by city of San Leandro vehicles. The City maintains the former wastewater treatment ponds adjacent to the levee and plans to use them as storm flow equalization basins in the future. Trucks with City staff routinely conduct visual inspections of the former wastewater ponds on a daily basis. To accommodate this connecting trail, the existing access road along the levee would be widened by means of a soldier pile and lagging retaining structure and placement of four feet oflightweight fill (Mark Thomas & Co., 2004a); this would be on lands under the iurisdiction of the Port of Oakland. The new 10-foot (3. I-meter) wide trail with 2-foot (0.6-meter) shoulders would be fenced off from the existing maintenance road. The proposed bike trail segment would connect with the existing Class I bike trail adjacent to the Galbraith Golf Course on the Port of Oakland property. The bridge and new bike trail would then provide a continuous bike path from Oakland to Hayward. Alternatives There are two alternatives related to construction of the bridge, and five alternatives related to construction of the trail (Table 1). Both bridge alternatives are described below, followed by a discussion of two alternatives for the trail. The three remaining trail alternatives have been withdrawn for the reasons stated at the end of this section. Table 1 Summary of Build Alternatives Alternative Bridge # 1 - Barge Alternative Bridge #2 - Trestle Alternative Trail # I - Retaining Structure Alternative (Port of Oakland side) Trail #2 - Mixed Use Trail/Road Alternative Trail #3 - Sheetpile Alternative (City side) Trail #4 - Levee Fill Alternative Trail #5 - Alternative Alignment Description Use shallow barges to bring in crane and bridge pieces Erect temporary trestle to hold crane and construct bridge Widen top of levee on Port of Oakland side Use existing levee road for trail and maintenance vehicles. Widen top oflevee on city of San Leandro-sedimentation pond side Widen top oflevee on Port of Oakland side with 2: I slope down to existing toe of levee Construct trail around gun club, with no bridge Status Preferred Alternative Alternative Preferred Alternative Alternative Alternative withdrawn Alternative withdrawn Alternative withdrawn Bridge Construction Alternatives The construction of the bridge portion of the project includes two possible Build alternatives that employ different construction techniques: use of shallow barges to bring in bridge pieces and cranes or, alternatively, construction of a temporary trestle along the side of the bridge alignment to provide Y4204IS.00693.doc - 4/5/07 -3-