US Bridges

Mn 40 over Ditch

FairPosted for load

Lac qui Parle County, Minnesota · 3.5 MI S of JCT TH 119 · Structure no. 6706

Built
1949
76 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
1,514
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 40 over Ditch is a concrete slab carrying Mn 40 over Ditch in Lac qui Parle County, Minnesota. It was built in 1949, so it is 76 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. Its operating status is: posted for load restriction.

It carries about 1,514 vehicles a day, roughly 23% of them trucks, projected to reach 1,450 by 2042. The structure is 27 ft (8.2 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesMn 40
CrossesDitch
Location3.5 MI S of JCT TH 119
RouteState Highway 40
CountyLac qui Parle County
StateMinnesota
Coordinates45.0292, -96.06274
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.7 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,514 (2022)
Projected traffic1,450 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$93 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 40 over Ditch built?

It was built in 1949, making it 76 years old in 2025.

What condition is Mn 40 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 September 2024.

How much traffic does Mn 40 over Ditch carry?

About 1,514 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is Mn 40 over Ditch?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 34 ft wide.

Who owns Mn 40 over Ditch?

It is owned by the State Highway Agency.