US Bridges

11th ST SW over Otter Creek

Good

Mercer County, North Dakota · 3 East 1 South of Beulah · Structure no. 000000029125210

Built
1986
39 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
200
2018 count
Owner
County
County Highway Agency

About this bridge

11th ST SW over Otter Creek is a prestressed concrete box beam or girders - single or spread carrying 11th ST SW over Otter Creek in Mercer County, North Dakota. It was built in 1986, so it is 39 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 200 vehicles a day, roughly 13% of them trucks, projected to reach 200 by 2038. The structure is 84 ft (25.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries11th ST SW
CrossesOtter Creek
Location3 East 1 South of Beulah
RouteCounty Highway 2920
Coordinates47.25581, -101.6938
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length84 ft (25.6 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2018)
Projected traffic200 by 2038
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 11th ST SW over Otter Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is 11th ST SW over Otter Creek 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 2024.

How much traffic does 11th ST SW over Otter Creek carry?

About 200 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is 11th ST SW over Otter Creek?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns 11th ST SW over Otter Creek?

It is owned by the County Highway Agency.