US Bridges

I 90 over N Br Root River

Fair

Olmsted County, Minnesota · 4.0 MI SW of JCT TH 63 · Structure no. 9858

Built
1961
64 years old, rebuilt 1984
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
182 ft
3 main spans
Daily traffic
5,824
2022 count
Owner
State
State Highway Agency

About this bridge

I 90 over N Br Root River is a prestressed concrete stringer/multi-beam or girder carrying I 90 over N Br Root River in Olmsted County, Minnesota. It was built in 1961 and reconstructed in 1984, so it is 64 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 5,824 vehicles a day, roughly 23% of them trucks, projected to reach 5,800 by 2042. The structure is 182 ft (55.5 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesI 90
CrossesN Br Root River
Location4.0 MI SW of JCT TH 63
RouteInterstate 90
Coordinates43.84413, -92.54161
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.3 US tons
Inventory rating48.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span60 ft (18.3 m)
Deck width52 ft (15.7 m)
Roadway width48 ft (14.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,824 (2022)
Projected traffic5,800 by 2042
Trucks23%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 over N Br Root River built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1984.

What condition is I 90 over N Br Root River 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 2024.

How much traffic does I 90 over N Br Root River carry?

About 5,824 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is I 90 over N Br Root River?

The structure is 182 ft (55.5 m) long with a longest span of 60 ft (18.3 m) and a deck 52 ft wide.

Who owns I 90 over N Br Root River?

It is owned by the State Highway Agency.