Engineering Project Case Studies | Erdman Anthony

Bridge Replacement

South Cascade Drive/Miller Road Bridge over Cattaraugus Creek

This project involved bridge-replacement design and construction on a New York state design-build procurement for a new 620-foot-long bridge that has three spans and a steel-multigirder superstructure. The bridge is roughly 40 miles south of Buffalo, NY, in a remote setting known as the Zoar Valley.

Erdman Anthony’s work on this project included:

  • Demolition of the existing 650-foot-long bridge
  • A work-zone traffic control/detour plan to maintain local and through traffic during construction of the new bridge
  • Coordination with utility owners requiring relocation and/or preservation of existing utilities
  • Wetland impact avoidance
  • Design of the replacement bridge

The new bridge’s selected spans are 210 feet, 250 feet, and 160 feet. The center span was set to provide adequate floodway for Cattaraugus Creek.

The taller of the two piers rises from its footing foundation to 164 feet, making it the tallest pier in New York state. A downstream dam will be removed in the future, so the pier pile foundations had to be designed without confining streambed soil. The bridge was evaluated for seismic and wind-load cases, without the confining streambed soil.

The existing bridge’s demolition required environmental permitting from the U.S. Army Corps of Engineers and the New York State Department of Environmental Conservation for temporary fills in the creek for a temporary bridge, temporary work platforms, and the actual bridge demolition and removal.


Award icon
2018 Gold Award
American Council of Engineering Companies (ACEC) of New York
Christopher Sichak, PE
Christopher Sichak, PE
 (585) 427-8888 x 1088