US Bridges

Csah 1 over I 90

Fair

Faribault County, Minnesota · 6.0 MI W of JCT TH 169 · Structure no. 22801

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
4 main spans
Daily traffic
481
2022 count
Owner
State
State Highway Agency

About this bridge

Csah 1 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 1 over I 90 in Faribault County, Minnesota. It was built in 1975, so it is 50 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 481 vehicles a day, projected to reach 530 by 2042. The structure is 305 ft (93.1 m) long and 50 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 1
CrossesI 90
Location6.0 MI W of JCT TH 169
RouteCounty Highway 1
CountyFaribault County
StateMinnesota
Coordinates43.66634, -94.22769
Functional classRural Major 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.
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 inspectionApril 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length305 ft (93.1 m)
Longest span86 ft (26.1 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic481 (2022)
Projected traffic530 by 2042
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 1 over I 90 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Csah 1 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 April 2023.

How much traffic does Csah 1 over I 90 carry?

About 481 vehicles per day (2022 count).

How long is Csah 1 over I 90?

The structure is 305 ft (93.1 m) long with a longest span of 86 ft (26.1 m) and a deck 50 ft wide.

Who owns Csah 1 over I 90?

It is owned by the State Highway Agency.