US Bridges

144 Street over North Fork Whetstone Rv

PoorPosted for load

Grant County, South Dakota · 0.6E & 5N Milbank · Structure no. 000000026296020

Built
1965
60 years old
Condition
Poor
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
90 ft
2 main spans
Daily traffic
52
2022 count
Owner
County
County Highway Agency

About this bridge

144 Street over North Fork Whetstone Rv is a prestressed concrete tee beam carrying 144 Street over North Fork Whetstone Rv in Grant County, South Dakota. It was built in 1965, so it is 60 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 3 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 52 vehicles a day, roughly 2% of them trucks, projected to reach 52 by 2032. The structure is 90 ft (27.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries144 Street
CrossesNorth Fork Whetstone Rv
Location0.6E & 5N Milbank
RouteCounty Highway 0
Coordinates45.29765, -96.62484
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating4 US tons
Inventory rating3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span49 ft (14.9 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2022)
Projected traffic52 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 144 Street over North Fork Whetstone Rv built?

It was built in 1965, making it 60 years old in 2025.

What condition is 144 Street over North Fork Whetstone Rv 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 144 Street over North Fork Whetstone Rv carry?

About 52 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 144 Street over North Fork Whetstone Rv?

The structure is 90 ft (27.4 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.

Who owns 144 Street over North Fork Whetstone Rv?

It is owned by the County Highway Agency.