US Bridges

30730 436th Avenue over Marne Creek

PoorPosted for load

Yankton County, South Dakota · 3.3S & 1E of Utica · Structure no. 000000068080163

Built
1935
90 years old, rebuilt 1960
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
33
2022 count
Owner
County
County Highway Agency

About this bridge

30730 436th Avenue over Marne Creek is a steel stringer/multi-beam or girder carrying 30730 436th Avenue over Marne Creek in Yankton County, South Dakota. It was built in 1935 and reconstructed in 1960, so it is 90 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 4 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 33 vehicles a day, roughly 2% of them trucks, projected to reach 33 by 2032. The structure is 33 ft (10.2 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries30730 436th Avenue
CrossesMarne Creek
Location3.3S & 1E of Utica
Coordinates42.93487, -97.47686
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating27 US tons
Inventory rating20.2 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length33 ft (10.2 m)
Longest span31 ft (9.4 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2022)
Projected traffic33 by 2032
Trucks2%
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$915,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 30730 436th Avenue over Marne Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1960.

What condition is 30730 436th Avenue over Marne Creek 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 30730 436th Avenue over Marne Creek carry?

About 33 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 30730 436th Avenue over Marne Creek?

The structure is 33 ft (10.2 m) long with a longest span of 31 ft (9.4 m) and a deck 22 ft wide.

Who owns 30730 436th Avenue over Marne Creek?

It is owned by the County Highway Agency.