US Bridges

Nd Highway 1804 over Whitetail Bay

Good

Williams County, North Dakota · 24 East of Williston · Structure no. 1804294267

Built
1995
30 years old
Condition
Good
inspected September 2021
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
460
2020 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 1804 over Whitetail Bay is a concrete culvert carrying Nd Highway 1804 over Whitetail Bay in Williams County, North Dakota. It was built in 1995, so it is 30 years old, younger 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 460 vehicles a day, roughly 22% of them trucks, projected to reach 460 by 2040. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 37.9 mi (61 km).

CarriesNd Highway 1804
CrossesWhitetail Bay
Location24 East of Williston
RouteState Highway 1804
Coordinates48.16583, -103.14171
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating99.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (2020)
Projected traffic460 by 2040
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nd Highway 1804 over Whitetail Bay built?

It was built in 1995, making it 30 years old in 2025.

What condition is Nd Highway 1804 over Whitetail Bay 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 September 2021.

How much traffic does Nd Highway 1804 over Whitetail Bay carry?

About 460 vehicles per day (2020 count), of which roughly 22% are trucks.

How long is Nd Highway 1804 over Whitetail Bay?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns Nd Highway 1804 over Whitetail Bay?

It is owned by the State Highway Agency.