US Bridges

Csah 29 over I 90

Fair

Winona County, Minnesota · 7.1 MI W of W JCT TH 43 · Structure no. 85822

Built
1969
56 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
289 ft
4 main spans
Daily traffic
1,300
2020 count
Owner
State
State Highway Agency

About this bridge

Csah 29 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 29 over I 90 in Winona County, Minnesota. It was built in 1969, so it is 56 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 1,300 vehicles a day, projected to reach 1,450 by 2040. The structure is 289 ft (88 m) long and 48 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesCsah 29
CrossesI 90
Location7.1 MI W of W JCT TH 43
RouteCounty Highway 29
Coordinates43.9323, -91.87932
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating30.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length289 ft (88 m)
Longest span88 ft (26.9 m)
Deck width48 ft (14.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2020)
Projected traffic1,450 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed19.3 mi (31 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 29 over I 90 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Csah 29 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 October 2024.

How much traffic does Csah 29 over I 90 carry?

About 1,300 vehicles per day (2020 count).

How long is Csah 29 over I 90?

The structure is 289 ft (88 m) long with a longest span of 88 ft (26.9 m) and a deck 48 ft wide.

Who owns Csah 29 over I 90?

It is owned by the State Highway Agency.