US Bridges

Ut 901 over Dark River

FairPosted for load

St. Louis County, Minnesota · 0.7 MI E of JCT TH 73 · Structure no. 69643

Built
2001
24 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
5
2011 count
Owner
County
County Highway Agency

About this bridge

Ut 901 over Dark River is a steel stringer/multi-beam or girder carrying Ut 901 over Dark River in St. Louis 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2039. The structure is 68 ft (20.6 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUt 901
CrossesDark River
Location0.7 MI E of JCT TH 73
RouteCounty Highway 901
CountySt. Louis County
StateMinnesota
Coordinates47.70375, -92.85001
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.8 US tons
Inventory rating22.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length68 ft (20.6 m)
Longest span62 ft (18.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2011)
Projected traffic5 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ut 901 over Dark River built?

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

What condition is Ut 901 over Dark 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 October 2023.

How much traffic does Ut 901 over Dark River carry?

About 5 vehicles per day (2011 count).

How long is Ut 901 over Dark River?

The structure is 68 ft (20.6 m) long with a longest span of 62 ft (18.9 m) and a deck 30 ft wide.

Who owns Ut 901 over Dark River?

It is owned by the County Highway Agency.