US Bridges

County Highway 139 over Sweet Briar Creek

Fair

Morton County, North Dakota · 2 North 2 East of Judson · Structure no. 000000030141090

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
64 ft
2 main spans
Daily traffic
405
2018 count
Owner
County
County Highway Agency

About this bridge

County Highway 139 over Sweet Briar Creek is a concrete tee beam carrying County Highway 139 over Sweet Briar Creek 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 405 vehicles a day, roughly 10% of them trucks, projected to reach 400 by 2038. The structure is 64 ft (19.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Highway 139
CrossesSweet Briar Creek
Location2 North 2 East of Judson
RouteCounty Highway 3006
Coordinates46.85119, -101.25319
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.9 US tons
Inventory rating39.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length64 ft (19.5 m)
Longest span30 ft (9.1 m)
Deck width37 ft (11.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic405 (2018)
Projected traffic400 by 2038
Trucks10%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway 139 over Sweet Briar Creek built?

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

What condition is County Highway 139 over Sweet Briar 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 July 2023.

How much traffic does County Highway 139 over Sweet Briar Creek carry?

About 405 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is County Highway 139 over Sweet Briar Creek?

The structure is 64 ft (19.5 m) long with a longest span of 30 ft (9.1 m) and a deck 37 ft wide.

Who owns County Highway 139 over Sweet Briar Creek?

It is owned by the County Highway Agency.