Featured Projects

HEI provided Phase I and II engineering services for the I-80 resurfacing/reconstruction project located in Rock Island and Henry Counties. Work entailed a 1.75 miles roadway resurfacing section, two roadway reconstruction sections totaling 1.0 mile and replacement of the dual structures carrying I-80 over the BNSF Railway, Barstow Road and the Green River. The reconstruction includes significant vertical profile adjustments to provide necessary clearances. Also included in the project, is the extension of the box culvert carrying the interstate over the Hennepin Canal Trail and drainage improvements. A component of this project included the vertical profile study of a county highway (Barstow Road) that was routinely closed due to Rock River flooding. The study involved a HEC-RAS modeling of the Rock River for several county highway improvement iterations. Phase I work which included Project Report, Interchange Type Study, Drainage Study, Structural TSL, Realignment Alternatives, Environmental Coordination, and MOT study. Phase II work: Roadway Reconstruction Design, Traffic control plan, Structure Design Drainage Design.

Downtown Reconstruction/Streetscape

HEI was selected by IDOT to provide Phase I and II engineering services for this $55M federal/state funded, 6.5 mile urban street rehabilitation project located from Martin Luther King Drive to Carnahan Drive in the City of Bloomington. The project consisted of milling, HMA resurfacing of multi-lane pavements, drainage improvements, sidewalk replacement including ADA ramps, addition of bike lanes, addition of transit stop accommodations, traffic signal improvements, and other intersection improvements to increase safety. HEI performed Phase I and II engineering services including accident analysis, traffic management plan, bicycle travel assessment, sidewalk and ADA evaluation (375 ramps), drainage study, utility coordination, environmental coordination, IDOT/FHWA coordination, public involvement including conducting public information meetings/ open houses and meeting with individual property owners, traffic signal study/ layout (24 locations), intersection design and type studies (5 intersections) including evaluation of roundabouts, HSM calculations, retaining wall studies, access control evaluation, soil borings, project phasing plan, development of Project Development Report, and plans, specifications, and estimates for state lettings. Due to the overall size and complexity of the project, HEI was tasked with developing a phasing plan that cost effectively allowed the project to be constructed under multiple contracts over multiple years. HEI was instrumental in helping IDOT secure $52.8M in federal grant funding through the USDOT Rural Surface Transportation grant program.

HEI was selected by IDOT to provide Phase I and II engineering services for this $75M federal/state funded, 6.0 mile urban street reconstruction project located from Gregory Street in the Town of Normal to Wood Street in the City of Bloomington. The multi-lane corridor consists of both one-way couple streets as well as two-way median divided access control sections. The heavily traveled route has average daily traffic volumes exceeding 23,000 with high pedestrian and bicycle volumes within the Illinois State University campus. The proposed project improvements consist of pavement replacement on new vertical alignment, widening/milling/HMA resurfacing of multi-lane pavements, drainage improvements, sidewalk replacement including ADA ramps, bicycle/ pedestrian accommodations, transit stop accommodations, traffic signal improvements, intersection upgrades, structure rehabilitation, and lighting. HEI performed Phase I and II engineering services including right-of-way, roadway geotechnical, pavement design, accident analysis, traffic management plan, bicycle travel assessment, sidewalk and ADA evaluation (579 ramps), drainage study, utility coordination, environmental and special waste coordination, IDOT/FHWA coordination, public involvement including conducting multiple public information meetings/open houses and meeting with individual property owners, traffic signal study/layout (34 locations), intersection design and type studies including evaluation of roundabouts, HSM calculations, retaining wall studies, access control evaluation, soil borings, project phasing plan, development of Project Development Report, and plans, specifications, and estimates for state lettings.

HEI was selected by the City of Peoria to provide Phase I and II engineering services for this STBG (Federal) and MFT funded, $7.1M urban intersection reconstruction project. The intent of the project was to replace deteriorated pavement, provide a safer intersection, and provide pedestrian and bicycle accommodations. The project consisted of complete removal of all infrastructure within the project limits which included 1,925’ of Pioneer Parkway and 1,350’ of University St. The construction work included the removal of all infrastructure within the ROW within the project limits and replacement with PCC pavement with aggregate subbase, curb and gutter, PCC islands and medians, storm sewer system, PCC sidewalks, HMA shared use path, PCC driveways, traffic signals, street lighting, landscaping, and other collateral work. HEI provided services including utility coordination, environmental coordination, traffic study including intersection design study, public involvement including property owner meetings and public information meeting, IDOT and FHWA coordination, drainage analysis, pavement design, multi-stage traffic management plan, ROW acquisition, development of an IDOT/FHWA approved PDR as well as plans, specifications and estimates for a state letting. Due to the urban area of the project, significant utility coordination and commercial business coordination were required. HEI led the efforts to coordinate multiple utility relocations to ensure all utility companies were provided space within the ROW that did not conflict with each other or proposed improvements. HEI also led efforts to coordinate with businesses including a busy gas station/convenient store and Walgreens to ensure access was maintained at all times.

HEI was selected by the LaSalle County Highway Department to provide preliminary engineering services for the Highway Safety Improvement Program (HSIP) project at the intersection of CH 15 and CH 4 north of Marseilles.