San Diego County, California
Print Case Study
North County Transit District/BNSF Railway
Joshua Grading & Excavating
BNSF Railway wanted to expand their rail lines to
accommodate three tracks in
MULTI-PLATE pipe arches were chosen to fit and
extend existing MULTI-PLATE structures in place along the
Installation time became a challenge when they realized
the railroad needed to remain open during construction.
A 14-hour window was given to assembly crews for the
multiple culvert extension before the tracks were opened
to live freight.
Due to the shortened time frame, BNSF chose two MULTI-PLATE pipe arches with concrete paved
inverts and two CSP round pipes. The structures were pre-assembled adjacent to the existing wood
trestle bridge and positioned under the existing railroad tracks.
The construction process concluded with a slurry fill around the openings to secure them in place
within the existing trestle structural members. Despite minimal cover over the culverts, the MULTIPLATE
arches with slurry backfill supports the railroad loads required for this project.
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