US Bridges

I 90 over Csah 9

Good

Rock County, Minnesota · 2.0 MI E of JCT TH 75 · Structure no. 67808

Built
1965
60 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
5,696
2022 count
Owner
State
State Highway Agency

About this bridge

I 90 over Csah 9 is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Csah 9 in Rock County, Minnesota. It was built in 1965, so it is 60 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,696 vehicles a day, roughly 24% of them trucks, projected to reach 4,900 by 2042. The structure is 112 ft (34 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesI 90
CrossesCsah 9
Location2.0 MI E of JCT TH 75
RouteInterstate 90
Coordinates43.6375, -96.17309
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating36.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length112 ft (34 m)
Longest span43 ft (13 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,696 (2022)
Projected traffic4,900 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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 9 built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 90 over Csah 9 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does I 90 over Csah 9 carry?

About 5,696 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I 90 over Csah 9?

The structure is 112 ft (34 m) long with a longest span of 43 ft (13 m) and a deck 41 ft wide.

Who owns I 90 over Csah 9?

It is owned by the State Highway Agency.