19E - SANTA ANA GRADE SEPARATION PROJECT

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Santa Ana Blvd. Grade Separation on the south side of Santa Ana Boulevard into a T- intersection that will allow full access to Santa Ana Boulevard from the south. The north leg will be terminated with a cul -de -sac and connectivity with Santa Ana Boulevard will be reestablished with a new access road. Due to the proximity to the southern leg of Fuller Street, access will be limited to right -in /right -out. 5.2 Structure The proposed underpass structure will match the current horizontal and vertical alignment of the two existing Metrolink tracks and span Santa Ana Boulevard which will be depressed under the tracks at this location. In addition, the underpass structure is also designed to meet the needs of the City's SARTC Master Plan, which entails new station areas, additional parking, and improved pedestrian and bicycle access as well as a future street car corridor, resulting in a four -span, simply- supported structure. The proposed underpass superstructure is a steel girder bridge since this is the SCRRA preferred bridge type for span length between 15 feet to 72 feet. Refer to Attachment C for the Bridge General Plans. 5.3 Pedestrian Bridge Two pedestrian bridges are proposed to flank both sides of the proposed railroad underpass structure. The proposed pedestrian bridges will provide connectivity between the residential neighborhood west of the railroad and potential mix -use developments east of the railroad bridge at the SARTC. The exact bridge type and configuration will be determined during the next phase of the project. Refer to Attachment D for a typical section of the proposed pedestrian bridge. 5.4 Stage Construction Stage construction is a critical component of this project as it affects right -of -way acquisition and access to the local businesses and properties. A detailed analysis and design for staging should be completed during the next phase of the project. However, several critical components have been identified and incorporated into the overall design during this phase. The following is a summary of construction staging. Attachment E contains plans of the concept. The first phase of construction involves constructing the shoofly and shifting Santa Ana Boulevard south of its current alignment onto a detour road. The shoofly is needed to maintain railroad operations. The shoofly is designed to maintain existing design speeds. A copy of the shoofly layout is included in Attachment F. The detour road will provide two travel lanes in each direction for the duration of the stage for approximately 12 months. Reducing the number of travel lanes will still allow Santa Ana Boulevard to operate at LOS A. The second phase of the construction will require complete closure of the eastbound direction on Santa Ana Boulevard, detouring eastbound traffic to Fruit utilizing the detour road. Westbound traffic will be maintained on the newly constructed roadway. The staging concept allows the railroad to remain fully operational during construction, although minor closures will be needed to allow switching over to the shoofly. The placement of the shoofly will allow the continued use of the easterly platforms at SARTC, greatly reducing the need for temporary platforms. It is noted that on June 3, 2014, Amtrak representatives agreed to a temporary platform length of 800 feet. 5.5 Right of Way Right -of -way needs are driven by the staging concept. Additional right -of -way is needed to construct a temporary detour road south of existing Santa Ana Boulevard and temporary PROJECT REPORT EQUIVALENT 19E -1$ 9