US Bridges

45750 300 St. over Spring Ck

Fair

Clay County, South Dakota · 3S & 5.5E Irene · Structure no. 000000014055030

Built
1999
26 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

45750 300 St. over Spring Ck is a prestressed concrete tee beam carrying 45750 300 St. over Spring Ck in Clay County, South Dakota. It was built in 1999, so it is 26 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 25 vehicles a day, roughly 2% of them trucks, projected to reach 97 by 2032. The structure is 41 ft (12.5 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries45750 300 St.
CrossesSpring Ck
Location3S & 5.5E Irene
RouteCounty Highway 0
Coordinates43.03986, -97.05101
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span39 ft (12 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic97 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 45750 300 St. over Spring Ck built?

It was built in 1999, making it 26 years old in 2025.

What condition is 45750 300 St. over Spring Ck in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does 45750 300 St. over Spring Ck carry?

About 25 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 45750 300 St. over Spring Ck?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (12 m) and a deck 22 ft wide.

Who owns 45750 300 St. over Spring Ck?

It is owned by the County Highway Agency.