US Bridges

Mn 11 over Warroad River

Fair

Roseau County, Minnesota · In Warroad · Structure no. 9059

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
156 ft
3 main spans
Daily traffic
6,870
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 11 over Warroad River is a steel continuous stringer/multi-beam or girder carrying Mn 11 over Warroad River in Roseau County, Minnesota. It was built in 1970, so it is 55 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 6,870 vehicles a day, roughly 11% of them trucks, projected to reach 8,200 by 2042. The structure is 156 ft (47.5 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMn 11
CrossesWarroad River
LocationIn Warroad
RouteState Highway 11
Coordinates48.90289, -95.32009
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating34.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span62 ft (18.9 m)
Deck width58 ft (17.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,870 (2022)
Projected traffic8,200 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 11 over Warroad River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Mn 11 over Warroad 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 Mn 11 over Warroad River carry?

About 6,870 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Mn 11 over Warroad River?

The structure is 156 ft (47.5 m) long with a longest span of 62 ft (18.9 m) and a deck 58 ft wide.

Who owns Mn 11 over Warroad River?

It is owned by the State Highway Agency.