US Bridges

Nd Highway 200 over Knife River

Fair

Mercer County, North Dakota · 2 North of Nd 200A · Structure no. 0200159886

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
172 ft
3 main spans
Daily traffic
790
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 200 over Knife River is a steel continuous stringer/multi-beam or girder carrying Nd Highway 200 over Knife River in Mercer County, North Dakota. It was built in 1950, so it is 75 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 6 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 790 vehicles a day, roughly 15% of them trucks, projected to reach 1,063 by 2039. The structure is 172 ft (52.4 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNd Highway 200
CrossesKnife River
Location2 North of Nd 200A
RouteState Highway 200
Coordinates47.32792, -101.50232
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating62.1 US tons
Inventory rating37.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length172 ft (52.4 m)
Longest span59 ft (18 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2019)
Projected traffic1,063 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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 200 over Knife River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nd Highway 200 over Knife River 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 July 2024.

How much traffic does Nd Highway 200 over Knife River carry?

About 790 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Nd Highway 200 over Knife River?

The structure is 172 ft (52.4 m) long with a longest span of 59 ft (18 m) and a deck 33 ft wide.

Who owns Nd Highway 200 over Knife River?

It is owned by the State Highway Agency.