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<br /> This superstructure alternative will require shoofly tracks, construction due to adequate redundancy in the system or
<br /> station modifications, and detoured traffic to isolate the the ability to backfeed the service to the end users.
<br /> bridge site com pletely for construction. Th is alternative
<br /> proposes to construct a railroad bridge by lowering the Santa Construction Staging: Where a utility corridor is not
<br /> Ana Boulevard. Atwo-Span Structure Alternative would work feasible and services must remain in service, construction
<br /> very well at this location. This proposed double track railroad staging must account for both the existing and permanent
<br /> bridge structure is approximately 126.7 feet long and 40.3 location of the utilities to ensure continual service. With
<br /> feet wide, with no skew to Santa Ana Boulevard. A Pier Bent the staged construction approach on this project, this
<br /> is needed in the median of Santa Ana Boulevard, which will is a feasible approach, though it may require temporary
<br /> result in the maximum span length of 63.3 feet, and therefore relocations to clear the stage one construction.
<br /> a SCRRA Standard Precast/Prestressed (PC/PS) Double
<br /> Cell Box Girder Structure can be used for the structure
<br /> type. Attention is directed to General Plan - PC/PS Con Box
<br /> Alternative, .
<br /> A precast, simply supported structure is the preferred
<br /> railroad bridge type because of its flexibility for repair and
<br /> replacement in the future. Significant shoring would be r, ~ ~ r~"" "
<br /> required around the construction area when constructing the
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<br /> bridge. Retainingwalls would be required forthe roadway M~`'~ ~ ~
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<br /> during the construction, the walls constructed parallel to „I~,1,~ , ~ ~ ~ ~ ~s
<br /> Santa Ana Boulevard could be constructed using "top-down" " ~ r'tA`~'"
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<br /> ...III
<br /> Always a significant concern on any grade separation due A-~-~ ~ r ;y
<br />
<br /> to the impact to existing facilities, AECOM takes a tried and
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<br /> trued approach to coordinating these efforts. This starts with ~ „
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<br /> our current relationships that we have developed on past
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<br /> projects with each of the utility companies, which allows us ~ ~ ~
<br /> to understand each of their needs, to develop a strategy for
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<br /> their relocation and to address im acts both Burin and after ~
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<br /> construction
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<br /> The key is to be proactive, meeting early and often, and ~~~aV,;~.,~~,~iiii I ~~~i~~ ~r~~p~~~7~ liiii~ ~~~~u.a„~~~~~~~~ ~,~a„~~~.~~,
<br /> disseminatingthe project information to each utility ii~~~~.a~~~a~tli~ii°~~u i~~~~.~; ~6 '~,p~~ ~~i~~aii~a,~iiir~~u
<br /> company. AECOM will develop a conceptual relocation plan
<br /> and refine this further with input from the utility companies.
<br /> No one will know the impacts and obstructions to be
<br /> encountered better than our designers, and it is up to us to
<br /> convey this information to the utility companies. Our goal
<br /> will be to provide a single relocation, when feasible, for each
<br /> utility within the project site. We have effectively achieved
<br /> this on past projects through the use of:
<br /> Utility Corridors: Utilize easements or acquired right-of-
<br /> wayoutside the Santa Ana Blvd. footprint, combining with
<br /> access roadways to better utilize space.The utility corridor
<br /> allows for a single relocation of each utility, eliminating the
<br /> need for temporary relocations, especially as the agency
<br /> typically will bear the cost of one of these relocations. This
<br /> will be the preferred method, especially with City owned land
<br /> on the south side, as well as many utilities already located
<br /> within the old Fruit Street right-of-way, outside of the grade
<br /> separation improvements.
<br /> Temporary Shutdowns: Early discussions with the utility
<br /> companies, especially water and gas, might yield the fact
<br /> that particular pipelines may be taken out of service during
<br /> a .
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