US Bridges

Con 2478 over I 494; TH 77 NB on Ramp

Fair

Hennepin County, Minnesota · At the JCT TH 77; 494 · Structure no. 27052D

Built
1989
36 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
621 ft
5 main spans
Daily traffic
4,549
2022 count
Owner
State
State Highway Agency

About this bridge

Con 2478 over I 494; TH 77 NB on Ramp is a steel continuous stringer/multi-beam or girder carrying Con 2478 over I 494; TH 77 NB on Ramp in Hennepin County, Minnesota. It was built in 1989, so it is 36 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.

It carries about 4,549 vehicles a day, projected to reach 10,000 by 2042. The structure is 621 ft (189.4 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCon 2478
CrossesI 494; TH 77 NB on Ramp
LocationAt the JCT TH 77; 494
RouteState Highway 2478
CountyHennepin County
StateMinnesota
Coordinates44.86217, -93.24546
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating82.8 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length621 ft (189.4 m)
Longest span156 ft (47.5 m)
Deck width26 ft (8 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,549 (2022)
Projected traffic10,000 by 2042
Trucks—
Lanes on structure1
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$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Con 2478 over I 494; TH 77 NB on Ramp built?

It was built in 1989, making it 36 years old in 2025.

What condition is Con 2478 over I 494; TH 77 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 2478 over I 494; TH 77 NB on Ramp carry?

About 4,549 vehicles per day (2022 count).

How long is Con 2478 over I 494; TH 77 NB on Ramp?

The structure is 621 ft (189.4 m) long with a longest span of 156 ft (47.5 m) and a deck 26 ft wide.

Who owns Con 2478 over I 494; TH 77 NB on Ramp?

It is owned by the State Highway Agency.