US Bridges

18th Ave. NW over Cedar Creek

Fair

Adams County, North Dakota · 6 West 16 North Hettinger · Structure no. 000000001111030

Built
1983
42 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
50
2019 count
Owner
County
County Highway Agency

About this bridge

18th Ave. NW over Cedar Creek is a prestressed concrete continuous box beam or girders - single or spread carrying 18th Ave. NW over Cedar Creek in Adams County, North Dakota. It was built in 1983, so it is 42 years old, younger 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 50 vehicles a day, projected to reach 55 by 2039. The structure is 108 ft (32.9 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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Carries18th Ave. NW
CrossesCedar Creek
Location6 West 16 North Hettinger
RouteCounty Highway 111
CountyAdams County
StateNorth Dakota
Coordinates46.24999, -102.77277
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.7 US tons
Inventory rating31.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length108 ft (32.9 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic55 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 18th Ave. NW over Cedar Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is 18th Ave. NW over Cedar 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 September 2023.

How much traffic does 18th Ave. NW over Cedar Creek carry?

About 50 vehicles per day (2019 count).

How long is 18th Ave. NW over Cedar Creek?

The structure is 108 ft (32.9 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns 18th Ave. NW over Cedar Creek?

It is owned by the County Highway Agency.