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<br /> San Bernardino, California AECOM provided preliminary engineering for a project Report (PR) and
<br /> Environmental Document (ED) for the Glen Helen Parkway grade separation
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<br /> over both Union Pacific (UP) and Burlington Northern Santa Fe (BNSF) railroad
<br /> I,,,,,,,,,W„~M „I„I„~~ tracks. Glen Helen parkway will be realigned and widened to four lanes to improve
<br /> regional traffic circulation, improve access to the Hyundai Pavillion at Glen Helen,
<br /> improve fire and emergency service response time, and provide anall-weather
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<br /> crossing over the Cajon Wash. To support the regional park, the concert venue,
<br /> and the recreational potential of the area, the project includes an equestrian trail
<br /> undercrossing and the pedestrian facilities will be ADA compliant.This project is
<br /> strongly supported by the County Board of Supervisors.
<br /> The project tasks include development of realignment alternatives, bridge
<br /> alternatives, evaluation of impacts to utilities and adjacent properties, developing
<br /> u engineering cost estimates, and assessing right-of-way impacts. Several major
<br /> ,~iii~ii~~iii~iir~ utility lines cross Glen Helen Parkway and accommodations or relocations of
<br /> utilities need to be made to construct the proposed improvements. The Cajon
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<br /> ~ Wash experiences severe flows i ,
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<br /> from the Cajon Pass.The bridge - ~ ~ ,~~s~~~
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<br /> ~~~~il.. ° must accommodate the flows and ~
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<br /> channel hydraulics will be studied ~
<br /> to determi ne the appropriate level x ~ti ~ , , , ~ ~ , ,~q ii r~~y
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<br /> ~ of scourprotection and bridge 7~.~ - ~
<br /> foundations. Major bridge structures " ~
<br /> and retaining walls will be used ~ ~ ~ ~ ~
<br /> to span the creek and railroads. ~
<br /> It is anticipated that substantial -
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<br /> protection from flood damage will
<br /> be require construction of dikes and
<br /> hard surfacing of embankments. ~ ~
<br /> Coachella, California AECOM provided preliminary and final engineering design for the Dillon Road
<br /> .w,,~. grade separation project. AECOM was responsible for all aspects of the project,
<br /> ~ from start to bid, including obtaining a PUC order to construct; developing and
<br /> participating in the negotiations with UPRR for the construction and maintenance
<br /> ~ agreement; environmental clearance; right-of-way; surveying; utility coordination;
<br /> roadway; bridge; landscape; traffic; and geotechnical.
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<br /> The selected alternative consists of spanning the roadway over the railroad and
<br /> Grapefruit Blvd./Indio Blvd., and then connecting to Avenue 48 westerly of the
<br /> intersection with Grapefruit Blvd./Indio Blvd. The alignment was offset from the
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<br /> existing alignment to avoid impacting
<br /> the traffic along Dillon Road/Avenue
<br /> °~~w 48, but mainly to avoid business
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<br /> ~,,,,,,,,,i„~~~i,;„r,,, loss due to modifying the frontage
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<br /> of Dillon Road, west of Grapefruit
<br /> Blvd./Indio Blvd.The alternative
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<br /> was selected over an undercrossin
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<br /> due to a variety of factors, including
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<br /> cost, and because of the necessity
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<br /> ~ to connect the tracks to two existing
<br /> siding tracks, each located less than
<br /> II'llflllll~ 1000 feet from the current at-grade
<br /> crossing with Dillon Road.
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