US Bridges

Interstate 29 over Branch of Antelope Creek

Fair

Richland County, North Dakota · 1 South of Nd 13 · Structure no. 0029021992

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
4,650
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 29 over Branch of Antelope Creek is a concrete culvert carrying Interstate 29 over Branch of Antelope Creek in Richland 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.

It carries about 4,650 vehicles a day, roughly 24% of them trucks, projected to reach 4,650 by 2039. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesInterstate 29
CrossesBranch of Antelope Creek
Location1 South of Nd 13
RouteInterstate 29
CountyRichland County
StateNorth Dakota
Coordinates46.25307, -96.83414
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,650 (2019)
Projected traffic4,650 by 2039
Trucks24%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Interstate 29 over Branch of Antelope Creek built?

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

What condition is Interstate 29 over Branch of Antelope 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 September 2024.

How much traffic does Interstate 29 over Branch of Antelope Creek carry?

About 4,650 vehicles per day (2019 count), of which roughly 24% are trucks.

How long is Interstate 29 over Branch of Antelope Creek?

The structure is 33 ft (10.1 m) long with a longest span of 12 ft (3.7 m).

Who owns Interstate 29 over Branch of Antelope Creek?

It is owned by the State Highway Agency.