Update: View open house and project status information at plymouthmn.gov/cr9bridgeproject.
To improve public safety and reduce congestion, the City of Plymouth is seeking $10.7 million in state bond funds to reconstruct the 53-year-old County Road 9 / Rockford Road bridge over I-494.
This vital interchange consists of a county road bridge over an interstate freeway, which was not completed during the I-494 project. Though it’s not city-owned infrastructure, the city is advocating for funding from the state to finish the job.
|THE PROBLEM||THE SOLUTION|
Public safety hazard
|The proposed diamond interchange will help improve public safety and traffic flow, and reduce congestion.|
Built in 1965, the bridge cannot accommodate existing traffic volumes and turning movements.
|Without dedicated left turn lanes, drivers must often wait for breaks in oncoming traffic to turn left onto I-494. Crashes occur when drivers veer from the left lane into the right through lane to avoid waiting. Rear-end and T-bone crashes are also common.||The proposed diamond interchange features dual left turn lanes onto I-494 and two through lanes in either direction, as well as dual left turn lanes from exit ramps.|
|Proposed diamond interchange (PDF)|
|Crumbling concrete and rusty rebar can be seen on both the surface and underside of the 52-year-old-bridge.|
Vital regional link
The interchange is a vital link to the regional transportation system. County Road 9 provides direct access to I-494, Highway 169, Highway 55 and Highway 100.
Barrier to economic development
The interchange plays an essential role in supporting the local and regional economy. However, congestion stifles business and job growth in this pivotal area of the region.
Built in 1965, the bridge is approaching life expectancy and is visibly deteriorating.
|PLYMOUTH THEN & NOW|
| 1964 - Undeveloped
Population: 14,000 | Average daily traffic: 1,500
| 2017 - Developed
Population: 75,000+ | Average daily traffic: 39,140
|When the County Road 9 bridge and I-494 were constructed in 1965, Plymouth was largely undeveloped and the interchange handled about 1,500 trips per day. Plymouth grew rapidly and the bridge quickly exceeded projected traffic volumes.||While development in Plymouth continues, the County Road 9 bridge handles 26 times the traffic levels than when initially constructed – an average of 39,140 vehicles per day. It has the highest traffic volume of all similar bridges over I-494.|
What Taxpayers are Saying
"Why wasn't this fixed when they updated 494?"
When MnDOT completed the two-year, $86 million I-494 Rehabilitation Project through Plymouth in 2016, many taxpayers were left wondering why the County Road 9 / Rockford Road bridge was seemingly forgotten.
Download the handout (PDF)