US Bridges

Mn 77 over I 494

Fair

Hennepin County, Minnesota · At the JCT TH 77; 494 · Structure no. 9082

Built
1958
67 years old, rebuilt 2014
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
164 ft
2 main spans
Daily traffic
20,151
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 77 over I 494 is a prestressed concrete stringer/multi-beam or girder carrying Mn 77 over I 494 in Hennepin County, Minnesota. It was built in 1958 and reconstructed in 2014, so it is 67 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 20,151 vehicles a day, projected to reach 19,500 by 2042. The structure is 164 ft (50 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesMn 77
CrossesI 494
LocationAt the JCT TH 77; 494
RouteState Highway 77
CountyHennepin County
StateMinnesota
Coordinates44.86225, -93.24731
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.5 US tons
Inventory rating48.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length164 ft (50 m)
Longest span81 ft (24.7 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,151 (2022)
Projected traffic19,500 by 2042
Trucks0%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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 Mn 77 over I 494 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2014.

What condition is Mn 77 over I 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 I 494 carry?

About 20,151 vehicles per day (2022 count).

How long is Mn 77 over I 494?

The structure is 164 ft (50 m) long with a longest span of 81 ft (24.7 m) and a deck 46 ft wide.

Who owns Mn 77 over I 494?

It is owned by the State Highway Agency.