Albertus L. Meyers Bridge

The Albertus L. Meyers Bridge, also known as the Eighth Street Bridge, the South Eighth Street Viaduct, and unsigned as SR 2055, is a reinforced concrete open-spandrel arch bridge located in Allentown, Pennsylvania. The bridge is "one of the earliest surviving examples of monumental, reinforced concrete construction," according to the American Society of Civil Engineers.

Upon its opening on November 17, 1913, the bridge, then known as the Eighth Street Bridge, was the longest and highest concrete bridge in the world.

The bridge spans the Little Lehigh Creek, linking Center City Allentown with Allentown's South Side. The bridge has seventeen spans and is longer than the more massive Tunkhannock Viaduct of the same type.

In 1974, the bridge was renamed in honor Albertus L. Meyers, who served as bandmaster of the Allentown Band for 50 years, from 1926 to 1976.

Planning and development
In 1911, the Lehigh Valley Transit Company in Allentown organized the Allentown Bridge Company for the sole purpose of "erecting, constructing and maintaining a bridge and approaches thereto over the Little Lehigh Creek." The bridge was designed by the engineering firm of Benjamin H. Davis and built by McArthur Brothers of New York City.

Costing in excess of $500,000, construction of the bridge lasted from July 1, 1912 to November 17, 1913 and required 29500 cuyd of concrete and 1,100,000 lb of metal reinforcing rods. The bridge spans the Little Lehigh Creek for a total length of 2,600'-0". It is an average of 38'-0" feet wide with two 16-0" travel lanes and two sidewalks. The main structure spanning Little Lehigh Creek consists of nine open-spandrel concrete deck arch spans, and there are eight closed-spandrel concrete deck arch approach spans.

Opening
Upon its November 17, 1913 opening, the bridge, then known as the Eighth Street Bridge, was the longest and highest concrete bridge in the world.

From its opening until the 1950s, the structure operated as a toll bridge with an automobile toll of five cents.

Electric street car service
The Liberty Bell Line, Lehigh Valley Transit's electric street car line, which ran from Allentown to Quakertown, Sellersville, Lansdale, Norristown and Philadelphia, ran across the bridge until that interurban service was discontinued on September 6, 1951. The concrete standards that once supported the trolley wire are still standing on the bridge to this day.

Albertus L. Meyers Bridge renaming
In 1974, the Eighth Street Bridge was formally renamed the Albertus L. Meyers Bridge in honor of Albertus L. Meyers, a conductor of the Allentown Band and a cornet player in John Philip Sousa's band. As a boy, Meyers played in the Allentown Band at the 1913 opening of the bridge that now bears his name.

National Register of Historic Places designation
On June 22, 1988, the Albertus L. Meyers Bridge was added to the U.S. National Register of Historic Places.