US Bridges

US 8 over TH 61

Fair

Washington County, Minnesota · 1.0 MI E of JCT TH 35 · Structure no. 82002

Built
1969
56 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
291 ft
4 main spans
Daily traffic
22,600
2019 count
Owner
State
State Highway Agency

About this bridge

US 8 over TH 61 is a prestressed concrete stringer/multi-beam or girder carrying US 8 over TH 61 in Washington County, Minnesota. It was built in 1969, so it is 56 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 22,600 vehicles a day, roughly 5% of them trucks, projected to reach 21,900 by 2039. The structure is 291 ft (88.8 m) long and 82 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 8
CrossesTH 61
Location1.0 MI E of JCT TH 35
RouteU.S. Route 8
Coordinates45.28898, -92.98398
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 rating81.2 US tons
Inventory rating24.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length291 ft (88.8 m)
Longest span82 ft (25 m)
Deck width82 ft (25.1 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,600 (2019)
Projected traffic21,900 by 2039
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 US 8 over TH 61 built?

It was built in 1969, making it 56 years old in 2025.

What condition is US 8 over TH 61 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 August 2023.

How much traffic does US 8 over TH 61 carry?

About 22,600 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is US 8 over TH 61?

The structure is 291 ft (88.8 m) long with a longest span of 82 ft (25 m) and a deck 82 ft wide.

Who owns US 8 over TH 61?

It is owned by the State Highway Agency.