US Bridges

I 35 over Cn RR

Poor

St. Louis County, Minnesota · 0.9 MI SW of JCT TH 535 · Structure no. 69866

Built
2011
14 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,161 ft
11 main spans
Daily traffic
22,000
2019 count
Owner
State
State Highway Agency

About this bridge

I 35 over Cn RR is a prestressed concrete stringer/multi-beam or girder carrying I 35 over Cn RR in St. Louis County, Minnesota. It was built in 2011, so it is 14 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 22,000 vehicles a day, roughly 5% of them trucks, projected to reach 21,250 by 2039. The structure is 1,161 ft (353.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 35
CrossesCn RR
Location0.9 MI SW of JCT TH 535
RouteInterstate 35
Coordinates46.75582, -92.13331
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.9 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans11
Design loadHL 93
Structure length1,161 ft (353.8 m)
Longest span119 ft (36.3 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2019)
Projected traffic21,250 by 2039
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 35 over Cn RR built?

It was built in 2011, making it 14 years old in 2025.

What condition is I 35 over Cn RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does I 35 over Cn RR carry?

About 22,000 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is I 35 over Cn RR?

The structure is 1,161 ft (353.8 m) long with a longest span of 119 ft (36.3 m) and a deck 45 ft wide.

Who owns I 35 over Cn RR?

It is owned by the State Highway Agency.