Region: Central
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MDOT I-94 DB West Ave Elm Ave US-127 Interchange
Our firm led the reconstruction, rehabilitation and widening of I-94 from east of Airport Road to west of the Grand River and east of the Cooper Street interchange to east of Dettman Road, spanning 3.5 miles. This project included converting the I-94/US-127/M-50/West Avenue interchange into a diverging diamond interchange (DDI) to enhance traffic flow and…
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I-94 Under Trumbull Avenue
The Trumbull Avenue bridge replacement over I-94 in Detroit was advanced as an early phase of the I-94 Modernization project to address the severely deteriorated condition of the existing structure and accommodate the planned future widening of I-94 below. The new bridge is a two-span steel plate girder structure supported by tall wall abutments and…
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Escanaba & Lake Superior Rail Road over US-2
A new single-span thru-girder railroad bridge was constructed over US-2 on a realigned track, improving rail operations while maintaining uninterrupted train service during construction. Pedestrian access along US-2 was provided through a box culvert located behind the new bridge abutment, minimizing the bridge span and enhancing safety. The design also included salvaging the existing bridge…
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Farm Lane Road & Rail Grade Separation
Conversion of two-lane roadway with two separate at-grade railroad crossings to a four-lane boulevard section with grade separated crossings on the campus of Michigan State University. This Farm Lane Grade Separation and roadway project extended from Mt. Hope Road northerly to Wilson Road and is located on the campus of Michigan State University (MSU), in…
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Silver Valley Elementary School
Silver Valley Elementary School, part of the Queen Creek Unified School District, is situated in the Cadence master-planned community in Mesa. While the site boundaries were established, none of the surrounding street or utility infrastructure had been designed when the project began. Our team worked closely with the master developer’s engineer to coordinate all necessary…
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Warner Gateway 202 Offsite Improvements
The Ellsworth Road project delivered vital infrastructure improvements across 1.5 miles of roadway in Mesa, Arizona, enhancing Ellsworth Road, Warner Road, and Starfire Avenue for an industrial developer. This comprehensive undertaking included installing complete underground utilities (sewer, water, storm drains, electrical, and communication systems) alongside surface improvements such as sidewalks, landscaping, paving, street lighting, and…
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Design Build Bridge Replacement 9 Mile Road Over I-75 Design Build
After a tanker truck fire caused the catastrophic collapse of the I-75 overpass at Nine Mile Road in Hazel Park, Michigan, our firm played a crucial role in its rapid reconstruction. Selected as lead bridge designer for the MDOT Design-Build project in October 2009, we assisted the Contractor team to deliver this emergency response project….
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I-75 University Drive DDI
Our firm designed Michigan’s first Diverging Diamond Interchange (DDI), a landmark structure spanning I-75 in Auburn Hills. The innovative two-span bridge features prestressed concrete bulb-tee girders supported by integral abutments behind MSE walls and a cap-and-column pier in the median. As part of an advanced Design-Build project, the team proposed an Alternative Technical Concept that…
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Allen Creek Berm Opening/Feasibility Study & Design
Located at the mouth of Allen Creek near the Ann Arbor Amtrak Station, this project addressed severe flooding caused by a railroad berm along the Michigan Line. The berm’s perpendicular alignment to the creek created floodplain depths up to 10 feet during major storms. Since MDOT owns and Amtrak operates the line, uninterrupted rail service…
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US-127 Reconstruction from I-96 to I-496
Our team is creating construction documents for three project phases to improve traffic flow along a critical 3.6-mile stretch of I-496 and US-127, extending from I-96 to the I-496/US-127/Trowbridge Road interchange. The project explores innovative congestion management strategies like Part-Time Shoulder Use (PTSU), dynamic lane use, variable speed limits, ramp metering, and permanent lanes—all aimed…
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Great Lakes Central Railroad over Manistee River
The existing 100+ year-old bridge carrying the Great Lakes Central Railroad (GLC RR) over the Manistee River in Manton, MI, is slated for replacement due to significant structural deterioration. The current structure, which includes a main span steel truss over the river and several deteriorated timber bent spans on steep, unstable slopes, is under a…
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Oklahoma
At Colliers Engineering & Design, you’ll find a complete range of land development and survey services designed for your needs, wherever you are in the Lone Star State. A Partnership You Can Rely On Our collaborative, multi-disciplined approach focuses on everything from transportation and civil/site development for private and public projects to building telecommunications and sustainable energy…