US Bridges

FM 346 over County Line Crk

Fair

Smith County, Texas · 0.7 MI S of FM 344 · Structure no. 102120176401001

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
4,314
2021 count
Owner
State
State Highway Agency

About this bridge

FM 346 over County Line Crk is a concrete culvert carrying FM 346 over County Line Crk in Smith County, Texas. It was built in 1965, so it is 60 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 4,314 vehicles a day, roughly 5% of them trucks, projected to reach 6,040 by 2041. The structure is 33 ft (10.1 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM 346
CrossesCounty Line Crk
Location0.7 MI S of FM 344
RouteState Highway 346
CountySmith County
StateTexas
Coordinates32.1377, -95.40592
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,314 (2021)
Projected traffic6,040 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 346 over County Line Crk built?

It was built in 1965, making it 60 years old in 2025.

What condition is FM 346 over County Line Crk 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 March 2023.

How much traffic does FM 346 over County Line Crk carry?

About 4,314 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FM 346 over County Line Crk?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns FM 346 over County Line Crk?

It is owned by the State Highway Agency.