US Bridges

Plettenberg Road over Polly Creek

PoorPosted for load

West Feliciana Parish, Louisiana · 3.5 Mi. SW of LA968 · Structure no. 616330532912901

Built
1975
50 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
110 ft
5 main spans
Daily traffic
110
2020 count
Owner
County
County Highway Agency

About this bridge

Plettenberg Road over Polly Creek is a steel stringer/multi-beam or girder carrying Plettenberg Road over Polly Creek in West Feliciana Parish, Louisiana. It was built in 1975, so it is 50 years old, older than the Louisiana average of 43 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 110 vehicles a day, projected to reach 121 by 2040. The structure is 110 ft (33.5 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesPlettenberg Road
CrossesPolly Creek
Location3.5 Mi. SW of LA968
RouteCounty Highway 0
CountyWest Feliciana Parish
StateLouisiana
Coordinates30.88548, -91.48376
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16 US tons
Inventory rating11 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans5
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span40 ft (12.2 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2020)
Projected traffic121 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Plettenberg Road over Polly Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Plettenberg Road over Polly 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 Plettenberg Road over Polly Creek carry?

About 110 vehicles per day (2020 count).

How long is Plettenberg Road over Polly Creek?

The structure is 110 ft (33.5 m) long with a longest span of 40 ft (12.2 m) and a deck 24 ft wide.

Who owns Plettenberg Road over Polly Creek?

It is owned by the County Highway Agency.