US Bridges

CR 321 over Ditch

Fair

St. Louis County, Minnesota · 0.1 MI E of JCT Csah 7 · Structure no. 97300

Built
1995
30 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
2
1984 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

CR 321 over Ditch is a concrete culvert carrying CR 321 over Ditch in St. Louis County, Minnesota. It was built in 1995, so it is 30 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 5 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 2 vehicles a day, projected to reach 2 by 2029. The structure is 26 ft (8 m) long. If it were closed, the detour would be 123 mi (198 km).

Location

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CarriesCR 321
CrossesDitch
Location0.1 MI E of JCT Csah 7
RouteCounty Highway 321
CountySt. Louis County
StateMinnesota
Coordinates47.22602, -92.60287
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.6 US tons
Inventory rating72.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length26 ft (8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (1984)
Projected traffic2 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123 mi (198 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 CR 321 over Ditch built?

It was built in 1995, making it 30 years old in 2025.

What condition is CR 321 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 2023.

How much traffic does CR 321 over Ditch carry?

About 2 vehicles per day (1984 count).

How long is CR 321 over Ditch?

The structure is 26 ft (8 m) long with a longest span of 10 ft (3 m).

Who owns CR 321 over Ditch?

It is owned by the Town or Township Highway Agency.