Design-build projects can be very challenging, and very rewarding. MI Engineering personnel have experience with large and small design-build projects. From initial proposals to technical presentations to completion of the project, we are dedicated to maintaining our high standards for quality design and on time delivery. Example projects highlighting recent staff experience are shown below.

Cooper River Bridge Replacement (Charleston, SC)

In 2002, MI Engineering staff working for Ko & Associates had the opportunity to partner with Parsons Brinckerhoff for design of the bridge on line 13 of the Mount Pleasant Interchange, part of the Cooper River Bridge Replacement Project.

The structure on line 13 consists of a 400 ft long two-span continuous curved steel girder bridge and a 875 ft long seven-span continuous precast prestressed bulb tee bridge. The piers are reinforced concrete hammer-heads on 6 ft diameter columns on 8 ft diameter drilled shafts.

The geotechnical conditions and seismic properties at the site posed major design challenges. But in the end the half billion dollar project was completed one year ahead of schedule and under budget.

US 64 Knightdale Bypass (Wake County, NC)

In 2003 MI Engineering staff working for Ko & Associates teamed with the LPA Group on the Knightdale Bypass design-build project. Our assignment included design of one half of a set of dual bridges carrying US 64 over the Neuse River and Mango Creek. The bridge has 15 spans for a total length of 460 meters (1509 ft) long. The superstructure consists of a concrete deck on prestressed concrete panels supported by prestressed bulb tees. The interior bents are concrete post-and-beam on drilled shafts with widely varying skew angles.

Due to the accelerated construction schedule, the structure was designed from the bottom up. Substructure elements were designed first in order for the contractor to begin the construction.

Design-Build Services

  • Concrete Decks and Flat Slab Spans
  • Prestressed Girders and Cored Slabs
  • Curved and Straight Steel Beams and Plate Girders
  • Standard and Integral End Bents
  • Hammerhead, Post and Beam, and Integral
  • Post-Tensioned Interior Bents
  • Spread Footings, Piles, and Deep Foundations
  • Culverts
  • Retaining Walls
  • Seismic Analysis
  • Latest LRFD Code