US Bridges

I 90 over Csah 12

Fair

Freeborn County, Minnesota · 2.9 MI E of JCT TH 109 · Structure no. 24839

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
206 ft
3 main spans
Daily traffic
4,400
2017 count
Owner
State
State Highway Agency

About this bridge

I 90 over Csah 12 is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Csah 12 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 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 4,400 vehicles a day, roughly 18% of them trucks, projected to reach 4,400 by 2039. The structure is 206 ft (62.9 m) long and 45 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesI 90
CrossesCsah 12
Location2.9 MI E of JCT TH 109
RouteInterstate 90
CountyFreeborn County
StateMinnesota
Coordinates43.67205, -93.50857
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating31.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length206 ft (62.9 m)
Longest span80 ft (24.4 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2017)
Projected traffic4,400 by 2039
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.3 mi (23 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 90 over Csah 12 built?

It was built in 1970, making it 55 years old in 2025.

What condition is I 90 over Csah 12 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 I 90 over Csah 12 carry?

About 4,400 vehicles per day (2017 count), of which roughly 18% are trucks.

How long is I 90 over Csah 12?

The structure is 206 ft (62.9 m) long with a longest span of 80 ft (24.4 m) and a deck 45 ft wide.

Who owns I 90 over Csah 12?

It is owned by the State Highway Agency.