US Bridges

SH 310 NB over Trinity River

Fair

Dallas County, Texas · 1.55 MI N of Lp 12 · Structure no. 180570009202371

Built
2002
23 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
2,746 ft
1 main span
Daily traffic
6,599
2023 count
Owner
State
State Highway Agency

About this bridge

SH 310 NB over Trinity River is a steel stringer/multi-beam or girder carrying SH 310 NB over Trinity River in Dallas County, Texas. It was built in 2002, so it is 23 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 5 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 6,599 vehicles a day, roughly 4% of them trucks, projected to reach 10,220 by 2035. The structure is 2,746 ft (837 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 310 NB
CrossesTrinity River
Location1.55 MI N of Lp 12
RouteState Highway 310
CountyDallas County
StateTexas
Coordinates32.72635, -96.75812
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+32 approach)
Design loadHS 20
Structure length2,746 ft (837 m)
Longest span201 ft (61.3 m)
Deck width39 ft (12 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,599 (2023)
Projected traffic10,220 by 2035
Trucks4%
Lanes on structure2
Traffic directionOne-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 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 SH 310 NB over Trinity River built?

It was built in 2002, making it 23 years old in 2025.

What condition is SH 310 NB over Trinity River 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 April 2024.

How much traffic does SH 310 NB over Trinity River carry?

About 6,599 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SH 310 NB over Trinity River?

The structure is 2,746 ft (837 m) long with a longest span of 201 ft (61.3 m) and a deck 39 ft wide.

Who owns SH 310 NB over Trinity River?

It is owned by the State Highway Agency.