US Bridges

81st Street North over Outlet Channel of Marsh

Good

McHenry County, North Dakota · SE 1/4 Sec 15 T159N R77W · Structure no. 000062620-58577

Built
2010
15 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
40
2022 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

81st Street North over Outlet Channel of Marsh is a concrete culvert carrying 81st Street North over Outlet Channel of Marsh in McHenry County, North Dakota. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 50 by 2042. The structure is 23 ft (7 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries81st Street North
CrossesOutlet Channel of Marsh
LocationSE 1/4 Sec 15 T159N R77W
RouteFederal Lands Road 0
Coordinates48.58933, -100.59533
Functional classRural Local

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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width56 ft (17.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic40 (2022)
Projected traffic50 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
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 81st Street North over Outlet Channel of Marsh built?

It was built in 2010, making it 15 years old in 2025.

What condition is 81st Street North over Outlet Channel of Marsh 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 July 2022.

How much traffic does 81st Street North over Outlet Channel of Marsh carry?

About 40 vehicles per day (2022 count).

How long is 81st Street North over Outlet Channel of Marsh?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m) and a deck 56 ft wide.

Who owns 81st Street North over Outlet Channel of Marsh?

It is owned by the Bureau of Fish and Wildlife.