US Bridges

Gatley ST over Black Bayou

FairPosted for load

Ouachita Parish, Louisiana · In West Monroe · Structure no. 053732293920881

Built
1975
50 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
131 ft
9 main spans
Daily traffic
300
1979 count
Owner
County
County Highway Agency

About this bridge

Gatley ST over Black Bayou is a wood or timber stringer/multi-beam or girder carrying Gatley ST over Black Bayou in Ouachita 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 300 vehicles a day, projected to reach 330 by 1999. The structure is 131 ft (39.9 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGatley ST
CrossesBlack Bayou
LocationIn West Monroe
RouteCounty Highway 0
CountyOuachita Parish
StateLouisiana
Coordinates32.48886, -92.14518
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26.3 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans9
Design loadH 15
Structure length131 ft (39.9 m)
Longest span16 ft (4.9 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (1979)
Projected traffic330 by 1999
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Gatley ST over Black Bayou built?

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

What condition is Gatley ST over Black Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Gatley ST over Black Bayou carry?

About 300 vehicles per day (1979 count).

How long is Gatley ST over Black Bayou?

The structure is 131 ft (39.9 m) long with a longest span of 16 ft (4.9 m) and a deck 24 ft wide.

Who owns Gatley ST over Black Bayou?

It is owned by the County Highway Agency.