US Bridges

Mn 4 over Ditch

Fair

Watonwan County, Minnesota · 5.9 MI N of ST James · Structure no. 83X01

Built
2012
13 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete
Length
41 ft
3 main spans
Daily traffic
893
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 4 over Ditch is a concrete culvert carrying Mn 4 over Ditch in Watonwan County, Minnesota. It was built in 2012, so it is 13 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 6 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 893 vehicles a day, roughly 19% of them trucks, projected to reach 1,200 by 2041. The structure is 41 ft (12.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesMn 4
CrossesDitch
Location5.9 MI N of ST James
RouteState Highway 4
Coordinates44.06214, -94.63959
Functional classRural 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length41 ft (12.4 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 traffic893 (2021)
Projected traffic1,200 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Mn 4 over Ditch built?

It was built in 2012, making it 13 years old in 2025.

What condition is Mn 4 over Ditch 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 October 2022.

How much traffic does Mn 4 over Ditch carry?

About 893 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is Mn 4 over Ditch?

The structure is 41 ft (12.4 m) long with a longest span of 12 ft (3.7 m).

Who owns Mn 4 over Ditch?

It is owned by the State Highway Agency.