US Bridges

Duncanville RD over IH 20

Fair

Dallas County, Texas · 2.3 MI E of Spur 408 · Structure no. 180570237404260

Built
1974
51 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
325 ft
4 main spans
Daily traffic
10,793
2019 count
Owner
State
State Highway Agency

About this bridge

Duncanville RD over IH 20 is a prestressed concrete stringer/multi-beam or girder carrying Duncanville RD over IH 20 in Dallas County, Texas. It was built in 1974, so it is 51 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 10,793 vehicles a day, projected to reach 6,000 by 2031. The structure is 325 ft (99.1 m) long and 94 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDuncanville RD
CrossesIH 20
Location2.3 MI E of Spur 408
RouteCity Street 159
CountyDallas County
StateTexas
Coordinates32.66481, -96.90832
Functional classUrban Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length325 ft (99.1 m)
Longest span95 ft (29 m)
Deck width94 ft (28.6 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,793 (2019)
Projected traffic6,000 by 2031
Trucks0%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Duncanville RD over IH 20 built?

It was built in 1974, making it 51 years old in 2025.

What condition is Duncanville RD over IH 20 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 Duncanville RD over IH 20 carry?

About 10,793 vehicles per day (2019 count).

How long is Duncanville RD over IH 20?

The structure is 325 ft (99.1 m) long with a longest span of 95 ft (29 m) and a deck 94 ft wide.

Who owns Duncanville RD over IH 20?

It is owned by the State Highway Agency.