US Bridges

Csah 13 over I 35

Good

Carlton County, Minnesota · 3.6 MI N of JCT TH 27 · Structure no. 09819

Built
1968
57 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
282 ft
4 main spans
Daily traffic
660
2020 count
Owner
State
State Highway Agency

About this bridge

Csah 13 over I 35 is a steel continuous stringer/multi-beam or girder carrying Csah 13 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 660 vehicles a day, projected to reach 680 by 2040. The structure is 282 ft (85.9 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesCsah 13
CrossesI 35
Location3.6 MI N of JCT TH 27
RouteCounty Highway 13
Coordinates46.49678, -92.68872
Functional classRural Minor 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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating48.6 US tons
Inventory rating29.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length282 ft (85.9 m)
Longest span89 ft (27.1 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic660 (2020)
Projected traffic680 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 13 over I 35 built?

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

What condition is Csah 13 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 August 2024.

How much traffic does Csah 13 over I 35 carry?

About 660 vehicles per day (2020 count).

How long is Csah 13 over I 35?

The structure is 282 ft (85.9 m) long with a longest span of 89 ft (27.1 m) and a deck 33 ft wide.

Who owns Csah 13 over I 35?

It is owned by the State Highway Agency.