US Bridges

County Highway over Storm Lake

Fair

Sargent County, North Dakota · South Edge of Milnor · Structure no. 000000041127030

Built
1954
71 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
24 ft
1 main span
Daily traffic
98
2022 count
Owner
County
County Highway Agency

About this bridge

County Highway over Storm Lake is a concrete tee beam carrying County Highway over Storm Lake in Sargent County, North Dakota. It was built in 1954, so it is 71 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 98 vehicles a day, roughly 13% of them trucks, projected to reach 132 by 2042. The structure is 24 ft (7.3 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Highway
CrossesStorm Lake
LocationSouth Edge of Milnor
RouteCounty Highway 0
CountySargent County
StateNorth Dakota
Coordinates46.25274, -97.45693
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98 (2022)
Projected traffic132 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 with deck rehabilitation or replacement
Estimated improvement cost$63,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Storm Lake built?

It was built in 1954, making it 71 years old in 2025.

What condition is County Highway over Storm Lake 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 June 2024.

How much traffic does County Highway over Storm Lake carry?

About 98 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is County Highway over Storm Lake?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 22 ft wide.

Who owns County Highway over Storm Lake?

It is owned by the County Highway Agency.