US Bridges

Mn 77 over I 35E Coll Roads

Fair

Dakota County, Minnesota · At the JCT TH 77; 35E · Structure no. 19860

Built
1979
46 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
614 ft
6 main spans
Daily traffic
32,050
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 77 over I 35E Coll Roads is a prestressed concrete stringer/multi-beam or girder carrying Mn 77 over I 35E Coll Roads in Dakota County, Minnesota. It was built in 1979, so it is 46 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 32,050 vehicles a day, roughly 8% of them trucks, projected to reach 36,500 by 2042. The structure is 614 ft (187.2 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMn 77
CrossesI 35E Coll Roads
LocationAt the JCT TH 77; 35E
RouteState Highway 77
CountyDakota County
StateMinnesota
Coordinates44.77846, -93.21709
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 rating58.1 US tons
Inventory rating34.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length614 ft (187.2 m)
Longest span111 ft (33.7 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,050 (2022)
Projected traffic36,500 by 2042
Trucks8%
Lanes on structure3
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 77 over I 35E Coll Roads built?

It was built in 1979, making it 46 years old in 2025.

What condition is Mn 77 over I 35E Coll Roads 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 35E Coll Roads carry?

About 32,050 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mn 77 over I 35E Coll Roads?

The structure is 614 ft (187.2 m) long with a longest span of 111 ft (33.7 m) and a deck 60 ft wide.

Who owns Mn 77 over I 35E Coll Roads?

It is owned by the State Highway Agency.