25C - AGMT - ENGINEERING SRVS - Laserfiche WebLink

Home Browse Search

Fairview Street is a 6 -lane roadway, with a striped median and sidewalks that narrows over the Santa Ana River. Built in 1963, the bridge consists of an eight span cast in place T- Girder structure. Existing bridge width accommodates four 11' -0" lanes with 3' -6" side shoulders. The shoulder doubles as unprotected pedestrian walkways, causing many people to cross the river by walking down to the river bottom. As the deck geometry does not meet current AASHTO standards and is rated a 4 in the Bridge Inspection Report (BIR), the City plans on widening the bridge to bring it to minimum standard of 5' -0" sidewalks, new safety barrier rails, and T -0" shoulders. We understand the City also plans to widen the bridge with additional lanes to match the road sections on the approaches. WKE has successfully applied on behalf of our clients with Caltrans Local Assistance to add features such as sidewalks, turn lanes, through lanes, and bike lanes to HBP funded projects. In our extensive experience in developing HBP project scopes, we use traffic modeling, and Fairview Bridge over the Santa Ana River has a bridge deck condition rating of 3, indicating the decks in "poor condition ", triggering the bridge eligibility for funding. A visual inspection reveals a large network of cracks both on top of the deck as well as the soffit. The cracking below the deck shows signs of phosfluorescence, a telling sign that cracks extend through the entire deck depth allowing water to seep through. The extensive cracking and poor overall deck condition requires more than methacrylate overlay which essentially only seals existing cracks, and does not reduce new cracks from forming. It is recommended to place a layer of polyester concrete overlaid on the existing deck to protect the deck and prevent further damage due 'to water and traffic wear. Our engineers have developed plans for several bridge rehabilitations with polyester concrete overlay, including McFadden Street and Fifth Street both over the Santa Ana River. A key concern is to limit the depth of overlay to less than 2.5" to ensure adhesion, while also providing a smooth transition the approach asphalt concrete. We will evaluate the structure for the additional v,,idemnc, the bridge. �� b ©slgn Survicee for Fairvimw Stremt Brldge Rmhabirtation 25C -17 Understanding g andlncof Need I 11