143rd Street Reconstruction
Increased traffic flow due to residential and commercial developments required roadway widening for additional travel and turn lanes. The area also experienced a growing frequency of roadway and property flooding as the natural overland flow routes through the existing ditch/culvert drainage system had been obstructed by development.
Our team worked with County staff to design improvements that would result in decreased traffic delays and flooding of roadway and adjacent properties as well as improved overall safety.
We began the project by surveying the roadway, determining existing right-of-way, and utilities. In order to design the most efficient and cost-effective intersection configuration, our traffic department developed an Intersection Design Study (IDS) for the intersection which determined that traffic volumes required a five-lane roadway.
HLR’s drainage department utilized hydrologic and hydraulic software to design a new 60-inch to 72-inch storm sewer system along 143rd Street and a new storm sewer to supplement an existing undersized box culvert along Will-Cook Road. Special junction chambers were designed to split flows between the new and existing systems and then recombine them before eventually discharging into Long Run Creek. The overall drainage design included the modification of two existing detention basins to help attenuate peak flows. A location drainage study was prepared for approval by IDOT because the east leg of the intersection is under IDOT jurisdiction.
Will County Division of Transportation
143rd Street (Bell Road to Will-Cook Road), Orland Park, Illinois
Al Stott, PE
Randal G. Newkirk, PE
Chris Olcott, PE
ReJena Lyon, PE, PLS