US Bridges

Perry Irwin Road over Tom Branch

Fair

Washington Parish, Louisiana · 1.2 Mi. E of LA 438 · Structure no. 625900000620364

Built
2018
7 years old
Condition
Fair
inspected September 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
46 ft
2 main spans
Daily traffic
180
2020 count
Owner
County
County Highway Agency

About this bridge

Perry Irwin Road over Tom Branch is a aluminum, wrought iron, or cast iron culvert carrying Perry Irwin Road over Tom Branch in Washington Parish, Louisiana. It was built in 2018, so it is 7 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 180 vehicles a day, projected to reach 198 by 2040. The structure is 46 ft (14 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPerry Irwin Road
CrossesTom Branch
Location1.2 Mi. E of LA 438
RouteCounty Highway 0
CountyWashington Parish
StateLouisiana
Coordinates30.97154, -90.00591
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating34.6 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans2
Design loadHL 93
Structure length46 ft (14 m)
Longest span20 ft (6.1 m)
Deck width41 ft (12.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic198 by 2040
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 Perry Irwin Road over Tom Branch built?

It was built in 2018, making it 7 years old in 2025.

What condition is Perry Irwin Road over Tom Branch 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 September 2024.

How much traffic does Perry Irwin Road over Tom Branch carry?

About 180 vehicles per day (2020 count).

How long is Perry Irwin Road over Tom Branch?

The structure is 46 ft (14 m) long with a longest span of 20 ft (6.1 m) and a deck 41 ft wide.

Who owns Perry Irwin Road over Tom Branch?

It is owned by the County Highway Agency.