US Bridges

FM 322 over Willow Slough

Fair

Anderson County, Texas · 5.3 MI S of US 84 · Structure no. 100010089003007

Built
1950
75 years old
Condition
Fair
inspected December 2022
Type
Culvert
Concrete
Length
34 ft
4 main spans
Daily traffic
1,548
2020 count
Owner
State
State Highway Agency

About this bridge

FM 322 over Willow Slough is a concrete culvert carrying FM 322 over Willow Slough in Anderson County, Texas. It was built in 1950, so it is 75 years old, older than the Texas average of 44.4 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 1,548 vehicles a day, roughly 12% of them trucks, projected to reach 2,150 by 2033. The structure is 34 ft (10.4 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFM 322
CrossesWillow Slough
Location5.3 MI S of US 84
RouteState Highway 322
CountyAnderson County
StateTexas
Coordinates31.68693, -95.63374
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length34 ft (10.4 m)
Longest span8 ft (2.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,548 (2020)
Projected traffic2,150 by 2033
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 322 over Willow Slough built?

It was built in 1950, making it 75 years old in 2025.

What condition is FM 322 over Willow Slough 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 December 2022.

How much traffic does FM 322 over Willow Slough carry?

About 1,548 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is FM 322 over Willow Slough?

The structure is 34 ft (10.4 m) long with a longest span of 8 ft (2.4 m) and a deck 30 ft wide.

Who owns FM 322 over Willow Slough?

It is owned by the State Highway Agency.