Spinder Bridge & Camp Street Improvements


City of East Peoria


East Peoria, Illinois

Camp Street












Spinder Bridge

Midwest Engineering Associates, Inc. was responsible for providing Phase I, Phase II, & Phase III Engineering Services for the design and construction of 0.2 miles of a new 3 lane roadway, the reconstruction of Camp Street (5 lanes) at the Camp Street and Altorfer Lane / Spinder Drive intersection and the construction of a new three span bridge over Farm Creek. The limited Phase I study evaluated alternate alignments, profiles, and alternate types of structures – clear span, two span, and three span. The project design (Phase II) included a new sanitary sewer system, new storm sewer system, new water main, two new signalized intersections, new stop sign controlled intersections, concrete pavement, and erosion control. The project was designed with New Urbanism, which included a multi-use path, landscaping, decorative pavement and architectural lighting. The new three span bridge consisted of a cast-in-place concrete deck on continuous, composite girders, with a back to back of abutments length of 225 feet. The typical width of the bridge was 59’-1”. The easternmost span included a splayed fascia beam to accommodate an adjacent street intersection. The design also included retaining walls and special embankment construction to maintain levee integrity during construction. An extensive 3D hydraulic analysis of the new bridge crossing was performed using cutting edge modeling software, along with preparing and acquiring the required permit from the United States Army Corps of Engineers (USACE), which required extensive coordination. The 3D modeling was required by the USACE since the bridge crossed a federal flood protection system. The proximity of the new bridge required the intersection to be raised 1.8 ft. in elevation while maintaining the existing bridge profile located on an adjacent leg within 50 ft. of the intersection.