US Bridges

Center Road over Ck

PoorPosted for load

Grant County, South Dakota · 1.5W & 5.1S Milbank · Structure no. 000000026275121

Built
1927
98 years old, rebuilt 1989
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
52 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

Center Road over Ck is a wood or timber stringer/multi-beam or girder carrying Center Road over Ck in Grant County, South Dakota. It was built in 1927 and reconstructed in 1989, so it is 98 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2032. The structure is 52 ft (15.9 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCenter Road
CrossesCk
Location1.5W & 5.1S Milbank
RouteCounty Highway 0
Coordinates45.14858, -96.67076
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating14 US tons
Inventory rating10 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length52 ft (15.9 m)
Longest span17 ft (5.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic50 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$600,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Center Road over Ck built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1989.

What condition is Center Road over Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Center Road over Ck carry?

About 20 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Center Road over Ck?

The structure is 52 ft (15.9 m) long with a longest span of 17 ft (5.3 m) and a deck 24 ft wide.

Who owns Center Road over Ck?

It is owned by the County Highway Agency.