US Bridges

County Road over Mouse River

PoorPosted for load

McHenry County, North Dakota · 1 East 8 North Karlsruhe · Structure no. 000000025122300

Built
1906
119 years old
Condition
Poor
inspected July 2024
Type
Truss - Thru
Steel
Length
119 ft
1 main span
Daily traffic
25
2018 count
Owner
County
County Highway Agency

About this bridge

County Road over Mouse River is a steel truss - thru carrying County Road over Mouse River in McHenry County, North Dakota. It was built in 1906, so it is 119 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, projected to reach 24 by 2038. The structure is 119 ft (36.3 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesMouse River
Location1 East 8 North Karlsruhe
RouteCounty Highway 0
CountyMcHenry County
StateNorth Dakota
Coordinates48.2037, -100.58332
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating13.2 US tons
Inventory rating7.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length119 ft (36.3 m)
Longest span100 ft (30.5 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deck14 ft (4.4 m)

Traffic and service

Average daily traffic25 (2018)
Projected traffic24 by 2038
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$303,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road over Mouse River built?

It was built in 1906, making it 119 years old in 2025.

What condition is County Road over Mouse River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does County Road over Mouse River carry?

About 25 vehicles per day (2018 count).

How long is County Road over Mouse River?

The structure is 119 ft (36.3 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.

Who owns County Road over Mouse River?

It is owned by the County Highway Agency.