US Bridges

Jefferson ST over Coburn Creek

PoorPosted for load

Washington Parish, Louisiana · 0.4 Mi.North of LA 10 · Structure no. 625930477895161

Built
1965
60 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
92 ft
6 main spans
Daily traffic
710
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Jefferson ST over Coburn Creek is a wood or timber stringer/multi-beam or girder carrying Jefferson ST over Coburn Creek in Washington Parish, Louisiana. It was built in 1965, so it is 60 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 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 710 vehicles a day, projected to reach 781 by 2040. The structure is 92 ft (28 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesJefferson ST
CrossesCoburn Creek
Location0.4 Mi.North of LA 10
RouteCounty Highway 0
CountyWashington Parish
StateLouisiana
Coordinates30.79561, -89.86219
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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating10 US tons
Inventory rating6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadH 10
Structure length92 ft (28 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic710 (2020)
Projected traffic781 by 2040
Trucks—
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

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$324,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Jefferson ST over Coburn Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Jefferson ST over Coburn 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 March 2024.

How much traffic does Jefferson ST over Coburn Creek carry?

About 710 vehicles per day (2020 count).

How long is Jefferson ST over Coburn Creek?

The structure is 92 ft (28 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns Jefferson ST over Coburn Creek?

It is owned by the City or Municipal Highway Agency.