US Bridges

75th Ave over Drainage Area

FairPosted for load

Morton County, North Dakota · 1 East 6 South of Hebron · Structure no. 000000030103121

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

75th Ave over Drainage Area is a wood or timber stringer/multi-beam or girder carrying 75th Ave over Drainage Area in Morton County, North Dakota. It was built in 1973, so it is 52 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 5 by 2038. The structure is 29 ft (8.8 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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Carries75th Ave
CrossesDrainage Area
Location1 East 6 South of Hebron
RouteCounty Highway 0
CountyMorton County
StateNorth Dakota
Coordinates46.80495, -102.03364
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23 US tons
Inventory rating16.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic5 by 2038
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$59,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 75th Ave over Drainage Area built?

It was built in 1973, making it 52 years old in 2025.

What condition is 75th Ave over Drainage Area 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 75th Ave over Drainage Area carry?

About 10 vehicles per day (2022 count).

How long is 75th Ave over Drainage Area?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 25 ft wide.

Who owns 75th Ave over Drainage Area?

It is owned by the County Highway Agency.