US Bridges

231st Street over Trib. to Jack Moore Crk

PoorPosted for load

Moody County, South Dakota · 2.0N & 5.3W of Egan · Structure no. 000000051067110

Built
1950
75 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

231st Street over Trib. to Jack Moore Crk is a steel stringer/multi-beam or girder carrying 231st Street over Trib. to Jack Moore Crk in Moody County, South Dakota. It was built in 1950, so it is 75 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 3 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 10 vehicles a day, projected to reach 10 by 2042. The structure is 30 ft (9.2 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries231st Street
CrossesTrib. to Jack Moore Crk
Location2.0N & 5.3W of Egan
RouteCounty Highway 0
Coordinates44.03694, -96.7525
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.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: 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 rating16.2 US tons
Inventory rating12.1 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length30 ft (9.2 m)
Longest span29 ft (8.8 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 231st Street over Trib. to Jack Moore Crk built?

It was built in 1950, making it 75 years old in 2025.

What condition is 231st Street over Trib. to Jack Moore Crk 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 August 2024.

How much traffic does 231st Street over Trib. to Jack Moore Crk carry?

About 10 vehicles per day (2022 count).

How long is 231st Street over Trib. to Jack Moore Crk?

The structure is 30 ft (9.2 m) long with a longest span of 29 ft (8.8 m) and a deck 20 ft wide.

Who owns 231st Street over Trib. to Jack Moore Crk?

It is owned by the County Highway Agency.