US Bridges

Con 4512 over NB on Ramp

Fair

Hennepin County, Minnesota · 1.4 MI N of JCT TH 394 · Structure no. 27818

Built
1980
45 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
117 ft
1 main span
Daily traffic
14,235
2022 count
Owner
State
State Highway Agency

About this bridge

Con 4512 over NB on Ramp is a steel stringer/multi-beam or girder carrying Con 4512 over NB on Ramp in Hennepin County, Minnesota. It was built in 1980, so it is 45 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 14,235 vehicles a day, roughly 21% of them trucks, projected to reach 7,000 by 2042. The structure is 117 ft (35.6 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCon 4512
CrossesNB on Ramp
Location1.4 MI N of JCT TH 394
RouteInterstate 4512
CountyHennepin County
StateMinnesota
Coordinates44.99626, -93.2822
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating82.8 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length117 ft (35.6 m)
Longest span108 ft (33 m)
Deck width64 ft (19.4 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,235 (2022)
Projected traffic7,000 by 2042
Trucks21%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Con 4512 over NB on Ramp built?

It was built in 1980, making it 45 years old in 2025.

What condition is Con 4512 over NB on Ramp 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 Con 4512 over NB on Ramp carry?

About 14,235 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is Con 4512 over NB on Ramp?

The structure is 117 ft (35.6 m) long with a longest span of 108 ft (33 m) and a deck 64 ft wide.

Who owns Con 4512 over NB on Ramp?

It is owned by the State Highway Agency.