US Bridges

135th Street over Moccasin Creek

Fair

Brown County, South Dakota · 2S & 0.8E of Aberdeen · Structure no. 000000007118350

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
900
2022 count
Owner
County
County Highway Agency

About this bridge

135th Street over Moccasin Creek is a prestressed concrete tee beam carrying 135th Street over Moccasin Creek in Brown County, South Dakota. It was built in 1977, so it is 48 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 5 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 900 vehicles a day, roughly 2% of them trucks, projected to reach 900 by 2032. The structure is 80 ft (24.4 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries135th Street
CrossesMoccasin Creek
Location2S & 0.8E of Aberdeen
RouteCounty Highway 6578
Coordinates45.43026, -98.476
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 spans2
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span39 ft (11.9 m)
Deck width39 ft (11.8 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2022)
Projected traffic900 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 135th Street over Moccasin Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is 135th Street over Moccasin Creek 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 2023.

How much traffic does 135th Street over Moccasin Creek carry?

About 900 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 135th Street over Moccasin Creek?

The structure is 80 ft (24.4 m) long with a longest span of 39 ft (11.9 m) and a deck 39 ft wide.

Who owns 135th Street over Moccasin Creek?

It is owned by the County Highway Agency.