US Bridges

County Highway over South Marias River

PoorPosted for load

Grand Forks County, North Dakota · 2 East 1 South Manvel · Structure no. 000000018136090

Built
1926
99 years old, rebuilt 2004
Condition
Poor
inspected September 2024
Type
Truss - Thru
Steel
Length
92 ft
1 main span
Daily traffic
24
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over South Marias River is a steel truss - thru carrying County Highway over South Marias River in Grand Forks County, North Dakota. It was built in 1926 and reconstructed in 2004, 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 24 vehicles a day, projected to reach 24 by 2039. The structure is 92 ft (28 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Highway
CrossesSouth Marias River
Location2 East 1 South Manvel
RouteCounty Highway 0
Coordinates48.06808, -97.12698
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating14.9 US tons
Inventory rating8.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 20
Structure length92 ft (28 m)
Longest span90 ft (27.4 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic24 (2019)
Projected traffic24 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 statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$267,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over South Marias River built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 2004.

What condition is County Highway over South Marias River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does County Highway over South Marias River carry?

About 24 vehicles per day (2019 count).

How long is County Highway over South Marias River?

The structure is 92 ft (28 m) long with a longest span of 90 ft (27.4 m) and a deck 18 ft wide.

Who owns County Highway over South Marias River?

It is owned by the County Highway Agency.