Cole County Route 50/63

Lafayette St. Interchange

Jefferson City, MO
Cole County Route 50/63 Lafayette St. Interchange

The Cole County US-50/63 (Rex Whitton Expressway) project also referred to as the Lafayette St. Interchange was an intense two-year project in Jefferson City, MO. Not only did this project replace, update, and expand existing corridor bridges and roadway through this heavily traveled section of US-50, but also created direct access to the downtown district and Lincoln University alleviating significant traffic congestion. The interchange was updated with sidewalks and crosswalks along both sides and improvements were made to a local recreation trail that is heavily used by students and residents in the area. A problematic vertical curve that blocked the view of existing traffic signal was lowered and US-50 was slightly realigned to allow for additional auxiliary lanes along both sides merging into the new interchange. The project is now known for its aesthetic appeal making it the marquee gateway into Jefferson City.

Owner Missouri Department of Transportation

Civil Engineer Missouri Department of Transportation

ESS Role General Contractor

Project Duration 23 months

Self-Performed 85%

Scope of Work

This project included the following: new concrete pavement (PCCP) diamond interchange giving US-50 traffic direct access to Lafayette St., and an additional lane of US-50 from Monroe St. to Lafayette St. and from Lafayette St. to Clark Ave. Three bridges were replaced along the corridor; Chestnut St. Bridge over US-50, Jackson St. Bridge over US-50, US-50 Bridge over Lafayette St. In addition, two new bridges were built as part of the new US-50 interchange and the Clark Ave. Bridge over US-50 was rehabilitated with a new bridge deck. Pavement reconstruction took place on Lafayette St. from Elm St. to East Handley Way, pavements north and south of the Clark Ave. Bridge were reconstructed, and US-50 pavement thru the project was replaced and the grade was lowered by four feet. 12 Mechanically Stabilized Earth (MSE) walls totaling 37,296 square feet and 40,178 square feet of Asethic Sound Wall between three locations, 84 vertical feet of drilled shafts, 48 vertical feet of rock sockets, and 5,035 linear feet of H-Piles.

Concrete 26,425 SY

Curb and Gutter 9,187 LF

Excavation & Grading 87,685 CY

Storm Sewer 7,418 LF, 105 structures

Sanitary Sewer 3,257 LF

Bridges 6