US Bridges

NB Dalrock Flyover over IH 30

Good

Dallas County, Texas · 7.3 MI NE of IH 635 · Structure no. 180570000911501

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,568 ft
14 main spans
Daily traffic
10,450
2023 count
Owner
State
State Highway Agency

About this bridge

NB Dalrock Flyover over IH 30 is a prestressed concrete stringer/multi-beam or girder carrying NB Dalrock Flyover over IH 30 in Dallas County, Texas. It was built in 2021, so it is 4 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,450 vehicles a day, roughly 2% of them trucks, projected to reach 1 by 1900. The structure is 1,568 ft (477.9 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNB Dalrock Flyover
CrossesIH 30
Location7.3 MI NE of IH 635
RouteCity Street 0
CountyDallas County
StateTexas
Coordinates32.87047, -96.53073
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans14
Design loadHL 93
Structure length1,568 ft (477.9 m)
Longest span149 ft (45.4 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,450 (2023)
Projected traffic1 by 1900
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB Dalrock Flyover over IH 30 built?

It was built in 2021, making it 4 years old in 2025.

What condition is NB Dalrock Flyover over IH 30 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does NB Dalrock Flyover over IH 30 carry?

About 10,450 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is NB Dalrock Flyover over IH 30?

The structure is 1,568 ft (477.9 m) long with a longest span of 149 ft (45.4 m) and a deck 38 ft wide.

Who owns NB Dalrock Flyover over IH 30?

It is owned by the State Highway Agency.