US Bridges

Csah 29 over I 90

Fair

Jackson County, Minnesota · 6.2 MI E of JCT TH 71 · Structure no. 32815

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
309 ft
4 main spans
Daily traffic
830
2016 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 Jackson County, Minnesota. It was built in 1971, so it is 54 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 830 vehicles a day, projected to reach 830 by 2039. The structure is 309 ft (94.2 m) long and 51 ft wide.

Location

Open in Google Maps
CarriesCsah 29
CrossesI 90
Location6.2 MI E of JCT TH 71
RouteCounty Highway 29
CountyJackson County
StateMinnesota
Coordinates43.65264, -94.87501
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 inspectionSeptember 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 rating75.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length309 ft (94.2 m)
Longest span86 ft (26.1 m)
Deck width51 ft (15.5 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic830 (2016)
Projected traffic830 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 1971, making it 54 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 September 2023.

How much traffic does Csah 29 over I 90 carry?

About 830 vehicles per day (2016 count).

How long is Csah 29 over I 90?

The structure is 309 ft (94.2 m) long with a longest span of 86 ft (26.1 m) and a deck 51 ft wide.

Who owns Csah 29 over I 90?

It is owned by the State Highway Agency.