US Bridges

Old NE Road over Big Buffalo Ck

PoorPosted for load

Jackson County, South Dakota · 2W & 2.4S Cactus Flat · Structure no. 000000036100136

Built
1940
85 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
2 main spans
Daily traffic
27
2022 count
Owner
County
County Highway Agency

About this bridge

Old NE Road over Big Buffalo Ck is a steel stringer/multi-beam or girder carrying Old NE Road over Big Buffalo Ck in Jackson County, South Dakota. It was built in 1940, so it is 85 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 27 vehicles a day, roughly 2% of them trucks, projected to reach 27 by 2032. The structure is 48 ft (14.6 m) long and 23 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesOld NE Road
CrossesBig Buffalo Ck
Location2W & 2.4S Cactus Flat
RouteCounty Highway 0
Coordinates43.79877, -101.93941
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating13 US tons
Inventory rating8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span22 ft (6.7 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2022)
Projected traffic27 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old NE Road over Big Buffalo Ck built?

It was built in 1940, making it 85 years old in 2025.

What condition is Old NE Road over Big Buffalo 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 2023.

How much traffic does Old NE Road over Big Buffalo Ck carry?

About 27 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Old NE Road over Big Buffalo Ck?

The structure is 48 ft (14.6 m) long with a longest span of 22 ft (6.7 m) and a deck 23 ft wide.

Who owns Old NE Road over Big Buffalo Ck?

It is owned by the County Highway Agency.