US Bridges

Csah 3 over Big Willow River

Good

Aitkin County, Minnesota · 2.1 MI E of JCT TH 169 · Structure no. 01530

Built
2011
14 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
185 ft
3 main spans
Daily traffic
637
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 3 over Big Willow River is a prestressed concrete stringer/multi-beam or girder carrying Csah 3 over Big Willow River in Aitkin County, Minnesota. It was built in 2011, so it is 14 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 637 vehicles a day, projected to reach 700 by 2042. The structure is 185 ft (56.3 m) long and 39 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesCsah 3
CrossesBig Willow River
Location2.1 MI E of JCT TH 169
RouteCounty Highway 3
Coordinates46.70999, -93.55621
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.4 US tons
Inventory rating46.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length185 ft (56.3 m)
Longest span61 ft (18.7 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic637 (2022)
Projected traffic700 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 3 over Big Willow River built?

It was built in 2011, making it 14 years old in 2025.

What condition is Csah 3 over Big Willow 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 Csah 3 over Big Willow River carry?

About 637 vehicles per day (2022 count).

How long is Csah 3 over Big Willow River?

The structure is 185 ft (56.3 m) long with a longest span of 61 ft (18.7 m) and a deck 39 ft wide.

Who owns Csah 3 over Big Willow River?

It is owned by the County Highway Agency.