US Bridges

145th Ave SW over Creek

FairPosted for load

Slope County, North Dakota · 6 South 3 West of Amidon · Structure no. 000000044132151

Built
1933
92 years old
Condition
Fair
inspected October 2024
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
10
2018 count
Owner
County
County Highway Agency

About this bridge

145th Ave SW over Creek is a wood or timber slab carrying 145th Ave SW over Creek in Slope County, North Dakota. It was built in 1933, so it is 92 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 20 by 2038. The structure is 24 ft (7.3 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
Carries145th Ave SW
CrossesCreek
Location6 South 3 West of Amidon
RouteCounty Highway 0
CountySlope County
StateNorth Dakota
Coordinates46.41726, -103.38411
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15.8 US tons
Inventory rating11.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic20 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$177,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 145th Ave SW over Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is 145th Ave SW over 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 October 2024.

How much traffic does 145th Ave SW over Creek carry?

About 10 vehicles per day (2018 count).

How long is 145th Ave SW over Creek?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns 145th Ave SW over Creek?

It is owned by the County Highway Agency.