US Bridges

LA0022 over Denham Canal

Fair

Ascension Parish, Louisiana · LA0022 · Structure no. 610302660205391

Built
1959
66 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
11,980
2021 count
Owner
State
State Highway Agency

About this bridge

LA0022 over Denham Canal is a concrete slab carrying LA0022 over Denham Canal in Ascension Parish, Louisiana. It was built in 1959, so it is 66 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.

It carries about 11,980 vehicles a day, roughly 7% of them trucks, projected to reach 13,178 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesLA0022
CrossesDenham Canal
LocationLA0022
RouteState Highway 22
CountyAscension Parish
StateLouisiana
Coordinates30.22999, -90.80064
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating23 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,980 (2021)
Projected traffic13,178 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$498,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0022 over Denham Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0022 over Denham Canal 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 May 2024.

How much traffic does LA0022 over Denham Canal carry?

About 11,980 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is LA0022 over Denham Canal?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0022 over Denham Canal?

It is owned by the State Highway Agency.