US Bridges

66th Ave over Drainage Area

Good

Morton County, North Dakota · 5 North 1 West Glen Ullin · Structure no. 000000030112061

Built
1963
62 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
90
2018 count
Owner
County
County Highway Agency

About this bridge

66th Ave over Drainage Area is a prestressed concrete box beam or girders - multiple carrying 66th Ave over Drainage Area in Morton County, North Dakota. It was built in 1963, so it is 62 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90 vehicles a day, projected to reach 100 by 2038. The structure is 41 ft (12.5 m) long and 30 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
Coordinates46.8969, -101.84464
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than 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 rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length41 ft (12.5 m)
Longest span37 ft (11.3 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.7 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 1963, making it 62 years old in 2025.

What condition is 66th Ave over Drainage Area in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. 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 41 ft (12.5 m) long with a longest span of 37 ft (11.3 m) and a deck 30 ft wide.

Who owns 66th Ave over Drainage Area?

It is owned by the County Highway Agency.