US Bridges

471st Avenue over Trib. to Jack Moore Crk

Fair

Moody County, South Dakota · 1E & 4.6N of Colman · Structure no. 000000051050105

Built
1925
100 years old, rebuilt 1938
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
43 ft
2 main spans
Daily traffic
330
2022 count
Owner
County
County Highway Agency

About this bridge

471st Avenue over Trib. to Jack Moore Crk is a concrete continuous culvert carrying 471st Avenue over Trib. to Jack Moore Crk in Moody County, South Dakota. It was built in 1925 and reconstructed in 1938, so it is 100 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 330 vehicles a day, roughly 3% of them trucks, projected to reach 330 by 2032. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries471st Avenue
CrossesTrib. to Jack Moore Crk
Location1E & 4.6N of Colman
RouteCounty Highway 0
CountyMoody County
StateSouth Dakota
Coordinates44.04557, -96.78874
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length43 ft (13.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2022)
Projected traffic330 by 2032
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 471st Avenue over Trib. to Jack Moore Crk built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1938.

What condition is 471st Avenue over Trib. to Jack Moore Crk 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 471st Avenue over Trib. to Jack Moore Crk carry?

About 330 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 471st Avenue over Trib. to Jack Moore Crk?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m).

Who owns 471st Avenue over Trib. to Jack Moore Crk?

It is owned by the County Highway Agency.