US Bridges

Con 4476 over Mn 15

Fair

Stearns County, Minnesota · At the JCT TH 15 · Structure no. 73873

Built
1977
48 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
399 ft
4 main spans
Daily traffic
6,900
2019 count
Owner
State
State Highway Agency

About this bridge

Con 4476 over Mn 15 is a steel continuous stringer/multi-beam or girder carrying Con 4476 over Mn 15 in Stearns County, Minnesota. It was built in 1977, so it is 48 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 6,900 vehicles a day, projected to reach 600 by 2039. The structure is 399 ft (121.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCon 4476
CrossesMn 15
LocationAt the JCT TH 15
RouteInterstate 4476
CountyStearns County
StateMinnesota
Coordinates45.49761, -94.24065
Functional classRural Principal Arterial - Interstate

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.
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 inspectionMay 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 rating64.8 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length399 ft (121.5 m)
Longest span109 ft (33.1 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2019)
Projected traffic600 by 2039
Trucks—
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

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 Con 4476 over Mn 15 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Con 4476 over Mn 15 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 May 2024.

How much traffic does Con 4476 over Mn 15 carry?

About 6,900 vehicles per day (2019 count).

How long is Con 4476 over Mn 15?

The structure is 399 ft (121.5 m) long with a longest span of 109 ft (33.1 m) and a deck 44 ft wide.

Who owns Con 4476 over Mn 15?

It is owned by the State Highway Agency.