US Bridges

Msas 108 over I 494

Fair

Washington County, Minnesota · 0.9 MI SW of JCT TH 120 · Structure no. 82511

Built
1994
31 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
288 ft
2 main spans
Daily traffic
11,500
2019 count
Owner
State
State Highway Agency

About this bridge

Msas 108 over I 494 is a prestressed concrete stringer/multi-beam or girder carrying Msas 108 over I 494 in Washington County, Minnesota. It was built in 1994, so it is 31 years old, younger 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 11,500 vehicles a day, projected to reach 9,400 by 2039. The structure is 288 ft (87.7 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMsas 108
CrossesI 494
Location0.9 MI SW of JCT TH 120
RouteCity Street 108
CountyWashington County
StateMinnesota
Coordinates44.91621, -92.9795
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.2 US tons
Inventory rating58.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length288 ft (87.7 m)
Longest span148 ft (45 m)
Deck width89 ft (27.1 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2019)
Projected traffic9,400 by 2039
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 108 over I 494 built?

It was built in 1994, making it 31 years old in 2025.

What condition is Msas 108 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 August 2023.

How much traffic does Msas 108 over I 494 carry?

About 11,500 vehicles per day (2019 count).

How long is Msas 108 over I 494?

The structure is 288 ft (87.7 m) long with a longest span of 148 ft (45 m) and a deck 89 ft wide.

Who owns Msas 108 over I 494?

It is owned by the State Highway Agency.