US Bridges

Mn 310 over Sprague Creek

Fair

Roseau County, Minnesota · 6.5 MI N of TH 11 · Structure no. 68007

Built
2001
24 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
3 main spans
Daily traffic
350
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 310 over Sprague Creek is a prestressed concrete stringer/multi-beam or girder carrying Mn 310 over Sprague Creek in Roseau County, Minnesota. It was built in 2001, so it is 24 years old, younger 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 350 vehicles a day, roughly 10% of them trucks, projected to reach 345 by 2038. The structure is 147 ft (44.9 m) long and 43 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesMn 310
CrossesSprague Creek
Location6.5 MI N of TH 11
RouteState Highway 310
CountyRoseau County
StateMinnesota
Coordinates48.94256, -95.76873
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length147 ft (44.9 m)
Longest span49 ft (14.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2018)
Projected traffic345 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 310 over Sprague Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is Mn 310 over Sprague Creek 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 310 over Sprague Creek carry?

About 350 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Mn 310 over Sprague Creek?

The structure is 147 ft (44.9 m) long with a longest span of 49 ft (14.9 m) and a deck 43 ft wide.

Who owns Mn 310 over Sprague Creek?

It is owned by the State Highway Agency.