US Bridges

SD049 over Moccasin Ck

Fair

Tripp County, South Dakota · 1 S of Hamill · Structure no. 000000062280133

Built
1973
52 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
119 ft
3 main spans
Daily traffic
502
2024 count
Owner
State
State Highway Agency

About this bridge

SD049 over Moccasin Ck is a concrete continuous slab carrying SD049 over Moccasin Ck in Tripp County, South Dakota. It was built in 1973, so it is 52 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 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 502 vehicles a day, roughly 17% of them trucks, projected to reach 681 by 2044. The structure is 119 ft (36.3 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesSD049
CrossesMoccasin Ck
Location1 S of Hamill
RouteState Highway 49
Coordinates43.58093, -99.68323
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating54.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span43 ft (13 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic502 (2024)
Projected traffic681 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SD049 over Moccasin Ck built?

It was built in 1973, making it 52 years old in 2025.

What condition is SD049 over Moccasin 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 March 2023.

How much traffic does SD049 over Moccasin Ck carry?

About 502 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is SD049 over Moccasin Ck?

The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13 m) and a deck 35 ft wide.

Who owns SD049 over Moccasin Ck?

It is owned by the State Highway Agency.