US Bridges

County Highway over Swan Creek

Fair

Cass County, North Dakota · 4 North of Wheatland · Structure no. 000000009117190

Built
1955
70 years old, rebuilt 1991
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
20
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Swan Creek is a prestressed concrete tee beam carrying County Highway over Swan Creek in Cass County, North Dakota. It was built in 1955 and reconstructed in 1991, so it is 70 years old, older than the North Dakota average of 48.2 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 20 vehicles a day, projected to reach 20 by 2039. The structure is 39 ft (11.9 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesSwan Creek
Location4 North of Wheatland
RouteCounty Highway 0
CountyCass County
StateNorth Dakota
Coordinates46.96911, -97.34543
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 rating70.5 US tons
Inventory rating42.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span37 ft (11.3 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2019)
Projected traffic20 by 2039
Trucks—
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

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 County Highway over Swan Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1991.

What condition is County Highway over Swan Creek 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 May 2023.

How much traffic does County Highway over Swan Creek carry?

About 20 vehicles per day (2019 count).

How long is County Highway over Swan Creek?

The structure is 39 ft (11.9 m) long with a longest span of 37 ft (11.3 m) and a deck 24 ft wide.

Who owns County Highway over Swan Creek?

It is owned by the County Highway Agency.