US Bridges

Msas 129 over TH 77

Fair

Hennepin County, Minnesota · 1.0 MI S of JCT TH 494 · Structure no. 27060

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
181 ft
2 main spans
Daily traffic
4,850
2018 count
Owner
State
State Highway Agency

About this bridge

Msas 129 over TH 77 is a steel continuous stringer/multi-beam or girder carrying Msas 129 over TH 77 in Hennepin County, Minnesota. It was built in 1978, so it is 47 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 4,850 vehicles a day, projected to reach 4,900 by 2038. The structure is 181 ft (55.2 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMsas 129
CrossesTH 77
Location1.0 MI S of JCT TH 494
RouteCity Street 129
CountyHennepin County
StateMinnesota
Coordinates44.84799, -93.24743
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.6 US tons
Inventory rating51.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length181 ft (55.2 m)
Longest span89 ft (27.2 m)
Deck width90 ft (27.5 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,850 (2018)
Projected traffic4,900 by 2038
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Msas 129 over TH 77 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Msas 129 over TH 77 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 Msas 129 over TH 77 carry?

About 4,850 vehicles per day (2018 count).

How long is Msas 129 over TH 77?

The structure is 181 ft (55.2 m) long with a longest span of 89 ft (27.2 m) and a deck 90 ft wide.

Who owns Msas 129 over TH 77?

It is owned by the State Highway Agency.