US Bridges

Con 5785 over Unstable Material

Fair

St. Louis County, Minnesota · 0.1 MI SW of JCT 5th Ave · Structure no. 69818B

Built
1985
40 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
333 ft
6 main spans
Daily traffic
1,890
2021 count
Owner
State
State Highway Agency

About this bridge

Con 5785 over Unstable Material is a prestressed concrete stringer/multi-beam or girder carrying Con 5785 over Unstable Material in St. Louis County, Minnesota. It was built in 1985, so it is 40 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 1,890 vehicles a day, roughly 11% of them trucks, projected to reach 2,000 by 2041. The structure is 333 ft (101.4 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCon 5785
CrossesUnstable Material
Location0.1 MI SW of JCT 5th Ave
RouteInterstate 5785
Coordinates46.78099, -92.10342
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.1 US tons
Inventory rating43.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length333 ft (101.4 m)
Longest span55 ft (16.8 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,890 (2021)
Projected traffic2,000 by 2041
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
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 Con 5785 over Unstable Material built?

It was built in 1985, making it 40 years old in 2025.

What condition is Con 5785 over Unstable Material 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 2024.

How much traffic does Con 5785 over Unstable Material carry?

About 1,890 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Con 5785 over Unstable Material?

The structure is 333 ft (101.4 m) long with a longest span of 55 ft (16.8 m) and a deck 24 ft wide.

Who owns Con 5785 over Unstable Material?

It is owned by the State Highway Agency.