Minnesota Department of Transportation

511 Travel Info

Hwy 24 bridge construction

Mississippi River in Clearwater

Hwy 24 bridge

Construction in progress

Status

Project is on schedule. Work continues on pier 6 and the east abutment.

Hwy 24 jobsite webcam. Watch bridge beams being delivered and placed in December 2016.

Looking ahead

Expect weekday closures on Hwy 24

Later in December, when the water levels of the Mississippi River lower, oversized concrete bridge beams will be delivered to the jobsite, and Hwy 24 will close periodically each weekday. Dates to be sent out when known.

The closures will occur from sunrise to sunset, up to four times each day, Mondays through Fridays, on good weather days. Each closure will last up to 15 minutes with flaggers holding traffic on both directions of Hwy 24. News release

In all, 46 beams will be delivered. Each beam is 178 feet long and weighs about 110 tons. The beams are manufactured in Minnesota, are delivered using specialty trucking equipment and will be placed atop the piers through December.

The work schedule is tentative and will depend on weather conditions and the water levels of the Mississippi River. The causeway needs to above water for crews to work.

Watch the webcam

Viewers can go online anytime and see the latest digital image taken every 15 minutes by the webcam. See what's going on now.

Stages, schedule

Location map - click on map for pdf version
Project location map

Hwy 24 open to traffic

The current bridge will remain open to traffic as the new one is built. Motorists may encounter heavy moving vehicles entering or exiting work areas.

Please stay out of fenced off work areas and equipment, both on land and in the river, for your safety and ours.

When the new bridge is opened to traffic in fall 2017, the old structure will be removed by June 30, 2018.

Project stages

1. Prepare jobsite - Complete

A temporary road known as a causeway is constructed from the west river bank out into the water to access the worksite.

2. Construct piers, abutments

Crews will construct bridge abutments and six piers from west to east across the river. Two piers are inland and four are in the river. Cofferdams, made from steel sheet pile, were driven into the riverbed to create a dry space to work in the river. Steel pile is driven deep into the earth to help form the foundation for the piers. Then piers are constructed inside the cofferdam.

3. Place beams

In all, 46 pre-stressed concrete beams, manufactured in Minnesota will be delivered one at time on oversized semi trailers to the jobsite. Each beam is 178 feet long and weighs about 110 tons. Two large specialized cranes will then lift and place each beam on top of the piers. Survey crews use GPS coordinates to ensure each beam is positioned exactly right.

4. Construct deck

In 2017, bridge enthusiasts will see crews complete the new bridge, including the deck surface, sidewalks, bridge railings, road and trail connections, aesthetics and more. The new bridge will open in Fall 2017.

5. Remove old bridge

Once the new bridge opens, the old structure and connections will be removed, and any other remaining work completed by June 30, 2018.

Poster showing stages

Schedule*

Prepare work area Aug. 15 - Fall 2015
Construct six piers, abutments Fall 2015 - Fall 2016
Place beams December 2016
Construct bridge deck surface, sidewalks, road and trail connections, aesthetics Spring - Fall 2017
Open to traffic Fall 2017
Remove old bridge and road connections, establish turf or landscape Fall 2017 - June 30, 2018,
includes over winter

*The contractor may work year round. Schedule is subject to change.

About this project

History

This project will replace the 57 year-old Highway 24 bridge spanning the Mississippi River and CR 7/Main St in Clearwater in Sherburne and Wright counties. The new bridge will be built just southeast, or downstream, from the current structure.

Existing Hwy 24 bridge
The current Hwy 24 bridge will remain open to traffic as the new one is built.

The river crossing serves commuter, freight and recreational traffic, with current average daily traffic volumes of 14,800 and forecast volumes of more than 30,000 vehicles per day in 2040.

The existing bridge was built in 1958 and is due for replacement. Shoulders are narrow and do not provide adequate room for handicap accessible vehicles, and sidewalks do not meet today's ADA requirements.

Benefits

The new two-lane bridge structure will include wider lanes, shoulders and a pedestrian sidewalk/trail separated by a concrete barrier for improved access and safety.

Aesthetics

Bridge drawing
Cost

  • $17.4 million

Prime Contractor

  • Lunda Construction

Web pg: J Seelen