US Bridges

Cedar Street over Marne Creek

PoorPosted for load

Yankton County, South Dakota · Cedar Street - Yankton · Structure no. 000000068121204

Built
1978
47 years old
Condition
Poor
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
969
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Cedar Street over Marne Creek is a prestressed concrete tee beam carrying Cedar Street over Marne Creek in Yankton County, South Dakota. It was built in 1978, so it is 47 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 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 969 vehicles a day, roughly 2% of them trucks, projected to reach 969 by 2032. The structure is 100 ft (30.5 m) long and 54 ft wide.

CarriesCedar Street
CrossesMarne Creek
LocationCedar Street - Yankton
RouteCity Street 0
Coordinates42.87481, -97.39526
Functional classUrban 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
Deck4 PoorAdvanced section loss, deterioration, 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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating16.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width54 ft (16.5 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic969 (2022)
Projected traffic969 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cedar Street over Marne Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Cedar Street 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 September 2024.

How much traffic does Cedar Street over Marne Creek carry?

About 969 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Cedar Street over Marne Creek?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 54 ft wide.

Who owns Cedar Street over Marne Creek?

It is owned by the City or Municipal Highway Agency.