US Bridges

US 75 over CO Ditch # 31

Good

Wilkin County, Minnesota · 2.5 MI N of JCT TH 210 · Structure no. 96577

Built
1988
37 years old
Condition
Good
inspected August 2025
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
1,318
2022 count
Owner
State
State Highway Agency

About this bridge

US 75 over CO Ditch # 31 is a concrete culvert carrying US 75 over CO Ditch # 31 in Wilkin County, Minnesota. It was built in 1988, so it is 37 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 1,318 vehicles a day, roughly 13% of them trucks, projected to reach 1,550 by 2042. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 75
CrossesCO Ditch # 31
Location2.5 MI N of JCT TH 210
RouteU.S. Route 75
Coordinates46.32586, -96.59235
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,318 (2022)
Projected traffic1,550 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 75 over CO Ditch # 31 built?

It was built in 1988, making it 37 years old in 2025.

What condition is US 75 over CO Ditch # 31 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 August 2025.

How much traffic does US 75 over CO Ditch # 31 carry?

About 1,318 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US 75 over CO Ditch # 31?

The structure is 40 ft (12.3 m) long with a longest span of 12 ft (3.7 m).

Who owns US 75 over CO Ditch # 31?

It is owned by the State Highway Agency.