US Bridges

Con 856 over TH 280 SB

Fair

Ramsey County, Minnesota · At JCT TH 35W; 280 · Structure no. 62821

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
199 ft
3 main spans
Daily traffic
2,350
2021 count
Owner
State
State Highway Agency

About this bridge

Con 856 over TH 280 SB is a prestressed concrete stringer/multi-beam or girder carrying Con 856 over TH 280 SB in Ramsey 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 2,350 vehicles a day, projected to reach 2,325 by 2041. The structure is 199 ft (60.7 m) long and 30 ft wide.

CarriesCon 856
CrossesTH 280 SB
LocationAt JCT TH 35W; 280
RouteState Highway 856
Coordinates45.01022, -93.20249
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.5 US tons
Inventory rating35.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length199 ft (60.7 m)
Longest span78 ft (23.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2021)
Projected traffic2,325 by 2041
Trucks—
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Con 856 over TH 280 SB built?

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

What condition is Con 856 over TH 280 SB 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 April 2024.

How much traffic does Con 856 over TH 280 SB carry?

About 2,350 vehicles per day (2021 count).

How long is Con 856 over TH 280 SB?

The structure is 199 ft (60.7 m) long with a longest span of 78 ft (23.8 m) and a deck 30 ft wide.

Who owns Con 856 over TH 280 SB?

It is owned by the State Highway Agency.