US Bridges

Csah 1 over I 35

Fair

Freeborn County, Minnesota · At Iowa State Line · Structure no. 24862

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
316 ft
4 main spans
Daily traffic
250
2017 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 Freeborn County, Minnesota. It was built in 1970, so it is 55 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 6 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 250 vehicles a day, projected to reach 250 by 2039. The structure is 316 ft (96.3 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCsah 1
CrossesI 35
LocationAt Iowa State Line
RouteCounty Highway 1
Coordinates43.4995, -93.35355
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.8 US tons
Inventory rating28.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length316 ft (96.3 m)
Longest span95 ft (29 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2017)
Projected traffic250 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 1970, making it 55 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 August 2023.

How much traffic does Csah 1 over I 35 carry?

About 250 vehicles per day (2017 count).

How long is Csah 1 over I 35?

The structure is 316 ft (96.3 m) long with a longest span of 95 ft (29 m) and a deck 36 ft wide.

Who owns Csah 1 over I 35?

It is owned by the State Highway Agency.