US Bridges

Davis Landing RD over Gum Bayou Bridge

Fair

St. Tammany Parish, Louisiana · 0.2 MI East of 1090 · Structure no. 625230190894361

Built
1986
39 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
1,392
2022 count
Owner
County
County Highway Agency

About this bridge

Davis Landing RD over Gum Bayou Bridge is a concrete slab carrying Davis Landing RD over Gum Bayou Bridge in St. Tammany Parish, Louisiana. It was built in 1986, so it is 39 years old, younger 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.

It carries about 1,392 vehicles a day, projected to reach 1,531 by 2042. The structure is 57 ft (17.4 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesDavis Landing RD
CrossesGum Bayou Bridge
Location0.2 MI East of 1090
RouteCounty Highway 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.31781, -89.72827
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,392 (2022)
Projected traffic1,531 by 2042
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 Davis Landing RD over Gum Bayou Bridge built?

It was built in 1986, making it 39 years old in 2025.

What condition is Davis Landing RD over Gum Bayou Bridge 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 January 2025.

How much traffic does Davis Landing RD over Gum Bayou Bridge carry?

About 1,392 vehicles per day (2022 count).

How long is Davis Landing RD over Gum Bayou Bridge?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns Davis Landing RD over Gum Bayou Bridge?

It is owned by the County Highway Agency.