US Bridges

66th Ave over Drainage Area

Fair

Morton County, North Dakota · 5 North 1 West Glen Ullin · Structure no. 000000030112060

Built
1964
61 years old
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
32 ft
1 main span
Daily traffic
90
2018 count
Owner
County
County Highway Agency

About this bridge

66th Ave over Drainage Area is a concrete channel beam carrying 66th Ave over Drainage Area in Morton County, North Dakota. It was built in 1964, so it is 61 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 90 vehicles a day, projected to reach 100 by 2038. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries66th Ave
CrossesDrainage Area
Location5 North 1 West Glen Ullin
RouteCounty Highway 3013
Coordinates46.90119, -101.84463
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.7 US tons
Inventory rating30.9 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 width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2018)
Projected traffic100 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 66th Ave over Drainage Area built?

It was built in 1964, making it 61 years old in 2025.

What condition is 66th 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 November 2024.

How much traffic does 66th Ave over Drainage Area carry?

About 90 vehicles per day (2018 count).

How long is 66th Ave 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 32 ft wide.

Who owns 66th Ave over Drainage Area?

It is owned by the County Highway Agency.