US Bridges

Csah 1 over I 35

Fair

Carlton County, Minnesota · 8.6 MI SW of W JCT TH 2 · Structure no. 09822

Built
1971
54 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
284 ft
4 main spans
Daily traffic
2,000
2018 count
Owner
State
State Highway Agency

About this bridge

Csah 1 over I 35 is a prestressed concrete stringer/multi-beam or girder carrying Csah 1 over I 35 in Carlton County, Minnesota. It was built in 1971, so it is 54 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,000 vehicles a day, projected to reach 2,150 by 2038. The structure is 284 ft (86.7 m) long and 51 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 1
CrossesI 35
Location8.6 MI SW of W JCT TH 2
RouteCounty Highway 1
CountyCarlton County
StateMinnesota
Coordinates46.69636, -92.36518
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating30.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length284 ft (86.7 m)
Longest span86 ft (26.1 m)
Deck width51 ft (15.4 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2018)
Projected traffic2,150 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 1 over I 35 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Csah 1 over I 35 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Csah 1 over I 35 carry?

About 2,000 vehicles per day (2018 count).

How long is Csah 1 over I 35?

The structure is 284 ft (86.7 m) long with a longest span of 86 ft (26.1 m) and a deck 51 ft wide.

Who owns Csah 1 over I 35?

It is owned by the State Highway Agency.