US Bridges

300 Street over Sand Ck

PoorPosted for load

Tripp County, South Dakota · 1.7W & 4S Keyapaha · Structure no. 000000062036500

Built
1967
58 years old
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
60 ft
3 main spans
Daily traffic
55
2022 count
Owner
County
County Highway Agency

About this bridge

300 Street over Sand Ck is a wood or timber stringer/multi-beam or girder carrying 300 Street over Sand Ck in Tripp County, South Dakota. It was built in 1967, so it is 58 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 55 vehicles a day, roughly 2% of them trucks, projected to reach 55 by 2032. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries300 Street
CrossesSand Ck
Location1.7W & 4S Keyapaha
RouteCounty Highway 0
Coordinates43.0536, -100.17414
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19.6 US tons
Inventory rating14.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span23 ft (7 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2022)
Projected traffic55 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 300 Street over Sand Ck built?

It was built in 1967, making it 58 years old in 2025.

What condition is 300 Street over Sand 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 June 2023.

How much traffic does 300 Street over Sand Ck carry?

About 55 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 300 Street over Sand Ck?

The structure is 60 ft (18.3 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns 300 Street over Sand Ck?

It is owned by the County Highway Agency.