Karl Nielsen

New East Span of the San Francisco Bay Bridge under construction during a foggy April afternoon in the Bay Area. New bridge will include a pedestrian and bike paths that will connect San Francisco and Alameda counties.
New East Span of the San Francisco Bay Bridge under construction during a foggy April afternoon in the Bay Area. New bridge will include a pedestrian and bike paths that will connect San Francisco and Alameda counties.

An unknown worker cuts through re-enforcing rebar in the concrete rubble of a demolished bridge on State Route Four in Antioch Ca. The bridge was demolished to make room for the widening of the Highway and the addition of a light rail system.
An unknown worker cuts through re-enforcing rebar in the concrete rubble of a demolished bridge on State Route Four in Antioch Ca. The bridge was demolished to make room for the widening of the Highway and the addition of a light rail system.

A large excavator fitted with a hydraulic hammer breaks down a section of  concrete bridge on State Route Four in Antioch Ca. The bridge was demolished to make room for the widening of the highway and the addition of a light rail system.
A large excavator fitted with a hydraulic hammer breaks down a section of concrete bridge on State Route Four in Antioch Ca. The bridge was demolished to make room for the widening of the highway and the addition of a light rail system.

Unknown worker uses gravel compactor to slat ten gravel that was disturbed during a night time highway closure.
Unknown worker uses gravel compactor to slat ten gravel that was disturbed during a night time highway closure.

Unknown worker sweeps up State Route 4 after a quick four lane closure during the night for construction.
Unknown worker sweeps up State Route 4 after a quick four lane closure during the night for construction.

Loveridge overpass during construction Spring of 2013.
Loveridge overpass during construction Spring of 2013.

View of State Route 4 from the top of a 145ft tall crane in Pittsburg Ca.
View of State Route 4 from the top of a 145ft tall crane in Pittsburg Ca.

Workers install rebar on a foggy morning in Pittsburg CA at the Loveridge overpass.
Workers install rebar on a foggy morning in Pittsburg CA at the Loveridge overpass.

Workers install I-Beams for the construction of a new bridge over State Route 4 at the Contra Loma site.
Workers install I-Beams for the construction of a new bridge over State Route 4 at the Contra Loma site.

Cyclists ride across an old bridge near Graton, California.
Cyclists ride across an old bridge near Graton, California.
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