US Bridges

107th Street over Elm River

Good

Brown County, South Dakota · 0.3 N 9.4 W of Frederick · Structure no. 000000007010070

Built
2015
10 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
166 ft
3 main spans
Daily traffic
77
2022 count
Owner
County
County Highway Agency

About this bridge

107th Street over Elm River is a prestressed concrete stringer/multi-beam or girder carrying 107th Street over Elm River in Brown County, South Dakota. It was built in 2015, so it is 10 years old, younger than the South Dakota average of 48.9 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 77 vehicles a day, roughly 4% of them trucks, projected to reach 105 by 2032. The structure is 166 ft (50.7 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Carries107th Street
CrossesElm River
Location0.3 N 9.4 W of Frederick
RouteCounty Highway 6170
Coordinates45.83758, -98.70162
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating65.9 US tons
Inventory rating50.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length166 ft (50.7 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77 (2022)
Projected traffic105 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 107th Street over Elm River built?

It was built in 2015, making it 10 years old in 2025.

What condition is 107th Street over Elm River 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 2023.

How much traffic does 107th Street over Elm River carry?

About 77 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 107th Street over Elm River?

The structure is 166 ft (50.7 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns 107th Street over Elm River?

It is owned by the County Highway Agency.