US Bridges

83rd Ave SW over Thirty Mile Creek

Fair

Hettinger County, North Dakota · 3 North 8 East of Mott · Structure no. 000000021137152

Built
1951
74 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
125 ft
3 main spans
Daily traffic
70
2018 count
Owner
County
County Highway Agency

About this bridge

83rd Ave SW over Thirty Mile Creek is a concrete tee beam carrying 83rd Ave SW over Thirty Mile Creek in Hettinger County, North Dakota. It was built in 1951, so it is 74 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 70 vehicles a day, projected to reach 80 by 2038. The structure is 125 ft (38.1 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries83rd Ave SW
CrossesThirty Mile Creek
Location3 North 8 East of Mott
RouteCounty Highway 2137
Coordinates46.42564, -102.15301
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length125 ft (38.1 m)
Longest span48 ft (14.6 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2018)
Projected traffic80 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$323,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 83rd Ave SW over Thirty Mile Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is 83rd Ave SW over Thirty Mile 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 2024.

How much traffic does 83rd Ave SW over Thirty Mile Creek carry?

About 70 vehicles per day (2018 count).

How long is 83rd Ave SW over Thirty Mile Creek?

The structure is 125 ft (38.1 m) long with a longest span of 48 ft (14.6 m) and a deck 22 ft wide.

Who owns 83rd Ave SW over Thirty Mile Creek?

It is owned by the County Highway Agency.