The Peninsula Corridor Joint Powers Board (PCJPB), which owns and operates Caltrain, has a capital program which includes the San Francisco Bridges Replacement project at 22nd Street, 23rd Street, and Paul Avenue in San Francisco. The project consists of removing and replacing two (2) existing steel-through girder vehicular/pedestrian bridges over the Caltrain tracks due to deteriorated conditions.
The PCJPB along with San Mateo County Transportation Authority (SMTA) and San Mateo County Transit (Samtrans)’s San Mateo Bridges Replacement project replaces four rail bridges in San Mateo’s North Central Neighborhood located at Tilton, Monte Diablo, Santa Inez and Poplar Avenues that are 100 years old and do not meet current seismic safety standards. The project consists of a four (4) foot track raise and 4,000 linear feet of pile retaining wall, roadway paving, and concrete flatwork.

Signet provided special inspection and material testing services including soils compaction, AC compaction, rebar, concrete, non-strength grout, PT strand stressing, shop UT, tensile and rebar tests.