I-255 Road and Bridge Rehabilitation
Interstate 255 is a 30-mile long bypass route that runs through Missouri and Illinois. Due to the very poor condition of the pavement and bridges…
I-255 Road and Bridge Rehabilitation
IL 97 over Spoon River
The bridge carrying IL 97 over Spoon River was originally constructed in 1926. Various repairs had been completed throughout the years, but the future use…
NBIS Quality Assurance Reviews
Oates Associates is working with the Bureau of Bridges and Structures (BBS) and Federal Highway Administration (FHWA) to provide annual Quality Assurance (QA) reviews of…
Scour Evaluations
The most common cause of bridge failure in the United States is scour and scour critical bridges are those that are most susceptible to a…
I-80 Structures over Hennepin Canal
Built in 1963, the dual structures carrying I-80 over the Hennepin Canal exhibited deterioration. Oates Associates completed engineering services for the preparation of contract plans,…
US 67 Jerseyville Bypass
US Route 67 is a major corridor extending over 220 miles from southwestern to northwestern Illinois. Wanting to provide motorists with improved roadway, intersections and…
FAP 310 / IL 255
Oates Associates provided construction services for the continued northward extension of IL 255. The 2 mile expansion includes grading, paving mechanically stabilized earth wall, and new…
Illinois Route 157
Phase I and II services were provided for this project, which involved the construction of a new 5-lane overpass taking IL-157 over the Union Pacific…
I-57 Feasibility Study and Bridge Replacements
The Illinois Department of Transportation initiated a study to determine the feasibility of widening I-57 (FAI-57) to add a third lane in each direction. Increased…