The $1.8-million S.R. 100, Section 013 and SR6100, Section 02B Design/Build Project, with Eastern Highway Specialists as our client and PennDOT as the owner, entailed the superstructure replacement of two 80-foot-long, single-span bridges. Both bridges are located in Lower Macungie Township, Lehigh County, PA, between the Borough of Macungie and the Village of Trexlertown. The S.R. 100 Bridge spans the Little Lehigh Creek and the S.R. 6100 Bridge crosses Spring Creek. Constructed in the late 1950s, both structures bridges had reached the original life span for which they were designed
Minor roadway work was required with the bridge construction. The S.R. 6100 Bridge was built using a detour. The S.R. 100 Bridge was built maintaining northbound traffic on the bridge with half width construction and a southbound detour.
The number of overhead wires in one intersection complicated the placement of temporary traffic signals, which prompted Bursich to employ its unique 3D Laser Scanner to survey the intersection. The scanner was able to survey the entire area, mitigating the need to enter and spend time identifying and requesting access to numerous private properties. In addition, the scanner precisely located every wire above the intersection so that Bursich could lay out the traffic signals and supporting wires and avoid, or at least identify, any conflicts with the existing wires.