US Bridges

Mn 77 over NB Off Ramp to WB 494

Fair

Hennepin County, Minnesota · 0.1 MI N of JCT TH 494 · Structure no. 27053

Built
1988
37 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
118 ft
3 main spans
Daily traffic
35,000
2017 count
Owner
State
State Highway Agency

About this bridge

Mn 77 over NB Off Ramp to WB 494 is a steel continuous stringer/multi-beam or girder carrying Mn 77 over NB Off Ramp to WB 494 in Hennepin County, Minnesota. It was built in 1988, so it is 37 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 35,000 vehicles a day, roughly 4% of them trucks, projected to reach 35,000 by 2039. The structure is 118 ft (36 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 77
CrossesNB Off Ramp to WB 494
Location0.1 MI N of JCT TH 494
RouteState Highway 77
CountyHennepin County
StateMinnesota
Coordinates44.86374, -93.24758
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJuly 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.1 US tons
Inventory rating50.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span50 ft (15.2 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,000 (2017)
Projected traffic35,000 by 2039
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$398 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 77 over NB Off Ramp to WB 494 built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mn 77 over NB Off Ramp to WB 494 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 July 2024.

How much traffic does Mn 77 over NB Off Ramp to WB 494 carry?

About 35,000 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Mn 77 over NB Off Ramp to WB 494?

The structure is 118 ft (36 m) long with a longest span of 50 ft (15.2 m) and a deck 45 ft wide.

Who owns Mn 77 over NB Off Ramp to WB 494?

It is owned by the State Highway Agency.