US Bridges

County Highway 90 over Drainage Area

PoorPosted for load

Morton County, North Dakota · 1 West 6 South of Hebron · Structure no. 000000030102120

Built
1968
57 years old
Condition
Poor
inspected September 2024
Type
Channel Beam
Concrete
Length
32 ft
1 main span
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

County Highway 90 over Drainage Area is a concrete channel beam carrying County Highway 90 over Drainage Area in Morton County, North Dakota. It was built in 1968, so it is 57 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, roughly 12% of them trucks, projected to reach 54 by 2042. The structure is 32 ft (9.8 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCounty Highway 90
CrossesDrainage Area
Location1 West 6 South of Hebron
RouteCounty Highway 0
Coordinates46.81469, -102.05484
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating13.2 US tons
Inventory rating10 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic54 by 2042
Trucks12%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway 90 over Drainage Area built?

It was built in 1968, making it 57 years old in 2025.

What condition is County Highway 90 over Drainage Area in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does County Highway 90 over Drainage Area carry?

About 40 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is County Highway 90 over Drainage Area?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 31 ft wide.

Who owns County Highway 90 over Drainage Area?

It is owned by the County Highway Agency.