US Bridges

SH 310 SB over IH 45

Fair

Dallas County, Texas · 0.4 MI S of IH 20 · Structure no. 180570009214213

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
381 ft
2 main spans
Daily traffic
6,661
2023 count
Owner
State
State Highway Agency

About this bridge

SH 310 SB over IH 45 is a steel continuous stringer/multi-beam or girder carrying SH 310 SB over IH 45 in Dallas County, Texas. It was built in 1973, so it is 52 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 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 6,661 vehicles a day, roughly 3% of them trucks, projected to reach 14,400 by 2040. The structure is 381 ft (116.1 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesSH 310 SB
CrossesIH 45
Location0.4 MI S of IH 20
RouteState Highway 310
CountyDallas County
StateTexas
Coordinates32.65863, -96.7213
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length381 ft (116.1 m)
Longest span122 ft (37.2 m)
Deck width44 ft (13.3 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,661 (2023)
Projected traffic14,400 by 2040
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 310 SB over IH 45 built?

It was built in 1973, making it 52 years old in 2025.

What condition is SH 310 SB over IH 45 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 October 2023.

How much traffic does SH 310 SB over IH 45 carry?

About 6,661 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SH 310 SB over IH 45?

The structure is 381 ft (116.1 m) long with a longest span of 122 ft (37.2 m) and a deck 44 ft wide.

Who owns SH 310 SB over IH 45?

It is owned by the State Highway Agency.