US Bridges

FM 323 over Alder Branch

Good

Anderson County, Texas · 11.0 MI SE of US 84 · Structure no. 100010089102004

Built
1954
71 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
345
2020 count
Owner
State
State Highway Agency

About this bridge

FM 323 over Alder Branch is a concrete culvert carrying FM 323 over Alder Branch in Anderson County, Texas. It was built in 1954, so it is 71 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 345 vehicles a day, roughly 11% of them trucks, projected to reach 680 by 2033. The structure is 22 ft (6.7 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFM 323
CrossesAlder Branch
Location11.0 MI SE of US 84
RouteState Highway 323
CountyAnderson County
StateTexas
Coordinates31.68898, -95.45856
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic345 (2020)
Projected traffic680 by 2033
Trucks11%
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 323 over Alder Branch built?

It was built in 1954, making it 71 years old in 2025.

What condition is FM 323 over Alder Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2022.

How much traffic does FM 323 over Alder Branch carry?

About 345 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is FM 323 over Alder Branch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns FM 323 over Alder Branch?

It is owned by the State Highway Agency.