Iron Horse Trail, Dublin Boulevard Overcrossing, City of Dublin, CA

Iron Horse Trail Dublin Boulevard Overcrossing Project will provide a safe crossing and facilitate improved traffic flow along Dublin Boulevard, providing a grade-separated bridge crossing over Dublin Boulevard for pedestrians and bicyclists. Currently, the trail runs from northwest to southeast as it approaches Dublin Boulevard, a heavily traveled east-west roadway. The existing trail at-grade crossing of Dublin Boulevard is quite skewed. Trail users approaching Dublin Boulevard from the southeast are currently required to turn left and use the sidewalk along the south side, cross the street at the Scarlett Drive signalized intersection, turn right and use the sidewalk along the north side of Dublin Boulevard to get back onto the trail. A new pedestrian overcrossing (POC) structure over Dublin Boulevard will have multiple support bents and retained earth ramps. The proposed main overcrossing structure is approximately 230 feet in length and 20 feet high at the tallest point where it spans Dublin Boulevard.

PARIKH provided geotechnical services and conducted engineering analyses and prepared a Foundation Report with recommendations for the cast-in-drilled-hole (CIDH) piles to support the bridge foundation, retaining wall with lightweight cellular concrete (LCC) backfill, and pavement recommendations.