US Bridges

Csah 4 over I 35

Good

Carlton County, Minnesota · 11.2 MI N of JCT TH 27 · Structure no. 09821

Built
1968
57 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
196 ft
4 main spans
Daily traffic
924
2022 count
Owner
State
State Highway Agency

About this bridge

Csah 4 over I 35 is a prestressed concrete stringer/multi-beam or girder carrying Csah 4 over I 35 in Carlton County, Minnesota. It was built in 1968, so it is 57 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 924 vehicles a day, projected to reach 960 by 2042. The structure is 196 ft (59.6 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCsah 4
CrossesI 35
Location11.2 MI N of JCT TH 27
RouteCounty Highway 4
Coordinates46.57726, -92.58548
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length196 ft (59.6 m)
Longest span57 ft (17.3 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic924 (2022)
Projected traffic960 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Csah 4 over I 35 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Csah 4 over I 35 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Csah 4 over I 35 carry?

About 924 vehicles per day (2022 count).

How long is Csah 4 over I 35?

The structure is 196 ft (59.6 m) long with a longest span of 57 ft (17.3 m) and a deck 33 ft wide.

Who owns Csah 4 over I 35?

It is owned by the State Highway Agency.