US Bridges

Mn 1 over Stony River

Good

Lake County, Minnesota · 0.4 MI SE of JCT Csah 2 · Structure no. 38018

Built
2020
5 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
99 ft
1 main span
Daily traffic
420
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 1 over Stony River is a concrete stringer/multi-beam or girder carrying Mn 1 over Stony River in Lake County, Minnesota. It was built in 2020, so it is 5 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 420 vehicles a day, roughly 8% of them trucks, projected to reach 460 by 2042. The structure is 99 ft (30.2 m) long and 39 ft wide.

CarriesMn 1
CrossesStony River
Location0.4 MI SE of JCT Csah 2
RouteState Highway 1
Coordinates47.65902, -91.59836
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating42.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length99 ft (30.2 m)
Longest span97 ft (29.6 m)
Deck width39 ft (12 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2022)
Projected traffic460 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 1 over Stony River built?

It was built in 2020, making it 5 years old in 2025.

What condition is Mn 1 over Stony River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Mn 1 over Stony River carry?

About 420 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mn 1 over Stony River?

The structure is 99 ft (30.2 m) long with a longest span of 97 ft (29.6 m) and a deck 39 ft wide.

Who owns Mn 1 over Stony River?

It is owned by the State Highway Agency.