US Bridges

31900 Lawrence RD over Ck

Good

Union County, South Dakota · 5N & 2E Elk Point · Structure no. 000000064074220

Built
1977
48 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

31900 Lawrence RD over Ck is a prestressed concrete tee beam carrying 31900 Lawrence RD over Ck in Union County, South Dakota. It was built in 1977, so it is 48 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries31900 Lawrence RD
CrossesCk
Location5N & 2E Elk Point
RouteCounty Highway 0
Coordinates42.76429, -96.65507
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.2 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 31900 Lawrence RD over Ck built?

It was built in 1977, making it 48 years old in 2025.

What condition is 31900 Lawrence RD over Ck 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 August 2024.

How much traffic does 31900 Lawrence RD over Ck carry?

About 45 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 31900 Lawrence RD over Ck?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.2 m) and a deck 28 ft wide.

Who owns 31900 Lawrence RD over Ck?

It is owned by the County Highway Agency.