Maryland Avenue Bridge over I-35E

Maryland Avenue Bridge over I-35E


Project Challenge

The Maryland Avenue Bridge, built in 1958, was structurally deficient and nearing the end of its usable life. The condition of both the superstructure and substructure was fair to poor, and the underside of the deck was delaminating onto moving traffic on I-35E below. The sufficiency rating of 77 and the traffic volumes on surrounding roads placed the bridge in a Tier 2 category. Minnesota Legislature 2008 requires that all Tier 1 and Tier 2 bridges be replaced or repaired by 2018.

The new bridge was the first in Minnesota to be built in two separates pieces and joined together with the use of a Self-Propelled Modular Transporter (SPMT). The pier and abutments were built in place alongside I-35E while the bridge spans were built nearby then put together later. This method of construction reduces the overall time of the project and the number of full closures of the interstate. Lunda Construction, one of the premier bridge builders in the state, was selected as the Design-Build contractor for the project.

Demolition of the old bridge was completed in July 2012, and the new bridge spans were moved into place only six weeks later, on Aug. 18. The new bridge opened to a single lane of traffic on Sept. 18, 2012.

Rani Engineering Solution

Rani provided construction layout for the Design-Build team.

  • Established a high accuracy control net on site
  • Laid out working points and offsets for pier/abutment and span construction
  • Verified existing conditions to ensure critical clearance and location values were met
  • Staked roadways, utilities, and other features as needed for site construction