US Bridges

Csah 1 over TH 77

Fair

Hennepin County, Minnesota · 1.7 MI S of JCT TH 494 · Structure no. 27062

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
249 ft
2 main spans
Daily traffic
12,890
2021 count
Owner
State
State Highway Agency

About this bridge

Csah 1 over TH 77 is a steel continuous stringer/multi-beam or girder carrying Csah 1 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 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 12,890 vehicles a day, projected to reach 14,400 by 2041. The structure is 249 ft (76 m) long and 114 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 1
CrossesTH 77
Location1.7 MI S of JCT TH 494
RouteCounty Highway 1
CountyHennepin County
StateMinnesota
Coordinates44.84084, -93.24433
Functional classUrban Minor Arterial

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.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.5 US tons
Inventory rating56.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length249 ft (76 m)
Longest span122 ft (37.2 m)
Deck width114 ft (34.8 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,890 (2021)
Projected traffic14,400 by 2041
Trucks—
Lanes on structure6
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 Csah 1 over TH 77 built?

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

What condition is Csah 1 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 Csah 1 over TH 77 carry?

About 12,890 vehicles per day (2021 count).

How long is Csah 1 over TH 77?

The structure is 249 ft (76 m) long with a longest span of 122 ft (37.2 m) and a deck 114 ft wide.

Who owns Csah 1 over TH 77?

It is owned by the State Highway Agency.