US Bridges

Lp 12 over Straight Branch

Fair

Dallas County, Texas · 2.85 MI W of US 75 · Structure no. 180570035305031

Built
1930
95 years old, rebuilt 1970
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
42,374
2022 count
Owner
State
State Highway Agency

About this bridge

Lp 12 over Straight Branch is a concrete culvert carrying Lp 12 over Straight Branch in Dallas County, Texas. It was built in 1930 and reconstructed in 1970, so it is 95 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 42,374 vehicles a day, roughly 2% of them trucks, projected to reach 58,130 by 2033. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLp 12
CrossesStraight Branch
Location2.85 MI W of US 75
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.86559, -96.81937
Functional classUrban Other Principal Arterial

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,374 (2022)
Projected traffic58,130 by 2033
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Lp 12 over Straight Branch built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1970.

What condition is Lp 12 over Straight 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 December 2023.

How much traffic does Lp 12 over Straight Branch carry?

About 42,374 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Lp 12 over Straight Branch?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns Lp 12 over Straight Branch?

It is owned by the State Highway Agency.