US Bridges

Island Rd. over Therese CR

Fair

West Feliciana Parish, Louisiana · 1.5 Mi. N.W. of US 61 · Structure no. 616300000616316

Built
2023
2 years old
Condition
Fair
inspected February 2024
Type
Orthotropic
Steel Continuous
Length
90 ft
1 main span
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Island Rd. over Therese CR is a steel continuous orthotropic carrying Island Rd. over Therese CR in West Feliciana Parish, Louisiana. It was built in 2023, so it is 2 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 100 vehicles a day, projected to reach 110 by 2040. The structure is 90 ft (27.4 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIsland Rd.
CrossesTherese CR
Location1.5 Mi. N.W. of US 61
RouteCounty Highway 0
CountyWest Feliciana Parish
StateLouisiana
Coordinates30.89126, -91.37946
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating36 US tons

Structure

Structure typeOrthotropic
MaterialSteel Continuous
DeckSteel plate
Main spans1
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span27 ft (8.2 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic110 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Island Rd. over Therese CR built?

It was built in 2023, making it 2 years old in 2025.

What condition is Island Rd. over Therese CR 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 February 2024.

How much traffic does Island Rd. over Therese CR carry?

About 100 vehicles per day (2020 count).

How long is Island Rd. over Therese CR?

The structure is 90 ft (27.4 m) long with a longest span of 27 ft (8.2 m) and a deck 18 ft wide.

Who owns Island Rd. over Therese CR?

It is owned by the County Highway Agency.