US Bridges

Dolphin RD over IH 30

Fair

Dallas County, Texas · 2.9 MI E of IH 45 · Structure no. 180570000911247

Built
1962
63 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
287 ft
3 main spans
Daily traffic
15,769
2014 count
Owner
State
State Highway Agency

About this bridge

Dolphin RD over IH 30 is a concrete continuous tee beam carrying Dolphin RD over IH 30 in Dallas County, Texas. It was built in 1962, so it is 63 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 15,769 vehicles a day, projected to reach 4,300 by 2036. The structure is 287 ft (87.5 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDolphin RD
CrossesIH 30
Location2.9 MI E of IH 45
RouteCity Street 193
CountyDallas County
StateTexas
Coordinates32.79195, -96.73744
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadH 20
Structure length287 ft (87.5 m)
Longest span71 ft (21.6 m)
Deck width37 ft (11.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,769 (2014)
Projected traffic4,300 by 2036
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$18,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dolphin RD over IH 30 built?

It was built in 1962, making it 63 years old in 2025.

What condition is Dolphin RD over IH 30 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 Dolphin RD over IH 30 carry?

About 15,769 vehicles per day (2014 count).

How long is Dolphin RD over IH 30?

The structure is 287 ft (87.5 m) long with a longest span of 71 ft (21.6 m) and a deck 37 ft wide.

Who owns Dolphin RD over IH 30?

It is owned by the State Highway Agency.