US Bridges

Mn 9 over Chippewa River

Fair

Swift County, Minnesota · 0.7 MI NW of JCT TH 29 · Structure no. 76009

Built
1984
41 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
172 ft
3 main spans
Daily traffic
2,539
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 9 over Chippewa River is a steel continuous stringer/multi-beam or girder carrying Mn 9 over Chippewa River in Swift County, Minnesota. It was built in 1984, so it is 41 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 2,539 vehicles a day, roughly 15% of them trucks, projected to reach 3,050 by 2042. The structure is 172 ft (52.3 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 9
CrossesChippewa River
Location0.7 MI NW of JCT TH 29
RouteState Highway 9
CountySwift County
StateMinnesota
Coordinates45.31925, -95.61628
Functional classRural Minor Arterial

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.3 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length172 ft (52.3 m)
Longest span67 ft (20.4 m)
Deck width53 ft (16.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,539 (2022)
Projected traffic3,050 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 9 over Chippewa River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Mn 9 over Chippewa 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 September 2024.

How much traffic does Mn 9 over Chippewa River carry?

About 2,539 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Mn 9 over Chippewa River?

The structure is 172 ft (52.3 m) long with a longest span of 67 ft (20.4 m) and a deck 53 ft wide.

Who owns Mn 9 over Chippewa River?

It is owned by the State Highway Agency.