US Bridges

County Road over South Marias River

Fair

Grand Forks County, North Dakota · 4 East 3 South Manvel · Structure no. 000000018139110

Built
1926
99 years old, rebuilt 1968
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
36 ft
1 main span
Daily traffic
2
2019 count
Owner
County
County Highway Agency

About this bridge

County Road over South Marias River is a wood or timber stringer/multi-beam or girder carrying County Road over South Marias River in Grand Forks County, North Dakota. It was built in 1926 and reconstructed in 1968, so it is 99 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 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 2 vehicles a day, projected to reach 2 by 2039. The structure is 36 ft (11.1 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCounty Road
CrossesSouth Marias River
Location4 East 3 South Manvel
RouteCounty Highway 0
CountyGrand Forks County
StateNorth Dakota
Coordinates48.03391, -97.07447
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
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 rating71.7 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length36 ft (11.1 m)
Longest span35 ft (10.8 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (2019)
Projected traffic2 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$75,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road over South Marias River built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1968.

What condition is County Road over South Marias River 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 County Road over South Marias River carry?

About 2 vehicles per day (2019 count).

How long is County Road over South Marias River?

The structure is 36 ft (11.1 m) long with a longest span of 35 ft (10.8 m) and a deck 24 ft wide.

Who owns County Road over South Marias River?

It is owned by the County Highway Agency.