US Bridges

CR 318 over Porter Branch

Fair

Burleson County, Texas · 0.5 MI W of FM 908 · Structure no. 170260AA0252003

Built
2001
24 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
150
2010 count
Owner
County
County Highway Agency

About this bridge

CR 318 over Porter Branch is a concrete culvert carrying CR 318 over Porter Branch in Burleson County, Texas. It was built in 2001, so it is 24 years old, younger 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 150 vehicles a day, projected to reach 160 by 2028. The structure is 31 ft (9.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR 318
CrossesPorter Branch
Location0.5 MI W of FM 908
RouteCounty Highway 318
CountyBurleson County
StateTexas
Coordinates30.51629, -96.84005
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width42 ft (12.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2010)
Projected traffic160 by 2028
Trucks0%
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 CR 318 over Porter Branch built?

It was built in 2001, making it 24 years old in 2025.

What condition is CR 318 over Porter 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 February 2024.

How much traffic does CR 318 over Porter Branch carry?

About 150 vehicles per day (2010 count).

How long is CR 318 over Porter Branch?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m) and a deck 42 ft wide.

Who owns CR 318 over Porter Branch?

It is owned by the County Highway Agency.