US Bridges

Csah 45 over I 90

Fair

Freeborn County, Minnesota · 0.4 MI W of JCT TH 35 · Structure no. 24823

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
266 ft
4 main spans
Daily traffic
1,750
2017 count
Owner
State
State Highway Agency

About this bridge

Csah 45 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 45 over I 90 in Freeborn 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 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 1,750 vehicles a day, projected to reach 1,750 by 2039. The structure is 266 ft (81 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 45
CrossesI 90
Location0.4 MI W of JCT TH 35
RouteCounty Highway 45
Coordinates43.68477, -93.32902
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
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length266 ft (81 m)
Longest span85 ft (26 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,750 (2017)
Projected traffic1,750 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 45 over I 90 built?

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

What condition is Csah 45 over I 90 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 45 over I 90 carry?

About 1,750 vehicles per day (2017 count).

How long is Csah 45 over I 90?

The structure is 266 ft (81 m) long with a longest span of 85 ft (26 m) and a deck 44 ft wide.

Who owns Csah 45 over I 90?

It is owned by the State Highway Agency.