US Bridges

Irrsr Nd Hway 1806 over Cantapeta Creek

Fair

Morton County, North Dakota · 4 North of Nd 24 · Structure no. 1806035070

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
162 ft
3 main spans
Daily traffic
1,450
2019 count
Owner
State
State Highway Agency

About this bridge

Irrsr Nd Hway 1806 over Cantapeta Creek is a prestressed concrete box beam or girders - multiple carrying Irrsr Nd Hway 1806 over Cantapeta Creek in Morton County, North Dakota. It was built in 1962, so it is 63 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 1,450 vehicles a day, roughly 8% of them trucks, projected to reach 1,540 by 2039. The structure is 162 ft (49.4 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIrrsr Nd Hway 1806
CrossesCantapeta Creek
Location4 North of Nd 24
RouteState Highway 1806
CountyMorton County
StateNorth Dakota
Coordinates46.42614, -100.63535
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length162 ft (49.4 m)
Longest span56 ft (17.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2019)
Projected traffic1,540 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$368,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Irrsr Nd Hway 1806 over Cantapeta Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Irrsr Nd Hway 1806 over Cantapeta 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 June 2024.

How much traffic does Irrsr Nd Hway 1806 over Cantapeta Creek carry?

About 1,450 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is Irrsr Nd Hway 1806 over Cantapeta Creek?

The structure is 162 ft (49.4 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.

Who owns Irrsr Nd Hway 1806 over Cantapeta Creek?

It is owned by the State Highway Agency.