US Bridges

SD037 over Timber Ck

Fair

Spink County, South Dakota · 1.8 N JCT Sd 20 W · Structure no. 000000058300043

Built
1955
70 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
54 ft
3 main spans
Daily traffic
785
2024 count
Owner
State
State Highway Agency

About this bridge

SD037 over Timber Ck is a concrete continuous slab carrying SD037 over Timber Ck in Spink County, South Dakota. It was built in 1955, so it is 70 years old, older than the South Dakota average of 48.9 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 785 vehicles a day, roughly 18% of them trucks, projected to reach 1,068 by 2044. The structure is 54 ft (16.5 m) long and 34 ft wide. If it were closed, the detour would be 51 mi (82 km).

CarriesSD037
CrossesTimber Ck
Location1.8 N JCT Sd 20 W
RouteState Highway 37
Coordinates45.17869, -98.10439
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length54 ft (16.5 m)
Longest span18 ft (5.6 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic785 (2024)
Projected traffic1,068 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed51 mi (82 km)
TollOn a free road
National Highway SystemNo

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 SD037 over Timber Ck built?

It was built in 1955, making it 70 years old in 2025.

What condition is SD037 over Timber Ck 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 June 2024.

How much traffic does SD037 over Timber Ck carry?

About 785 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SD037 over Timber Ck?

The structure is 54 ft (16.5 m) long with a longest span of 18 ft (5.6 m) and a deck 34 ft wide.

Who owns SD037 over Timber Ck?

It is owned by the State Highway Agency.