US Bridges

IH 20 Conn G over IH 20/SPUR 408

Fair

Dallas County, Texas · 2.2 MI E of FM 1382 · Structure no. 180570237404300

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,925 ft
2 main spans
Daily traffic
24,021
2019 count
Owner
State
State Highway Agency

About this bridge

IH 20 Conn G over IH 20/SPUR 408 is a steel continuous stringer/multi-beam or girder carrying IH 20 Conn G over IH 20/SPUR 408 in Dallas County, Texas. It was built in 1975, so it is 50 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 24,021 vehicles a day, projected to reach 33,629 by 2030. The structure is 1,925 ft (586.7 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIH 20 Conn G
CrossesIH 20/SPUR 408
Location2.2 MI E of FM 1382
RouteState Highway 20
CountyDallas County
StateTexas
Coordinates32.66956, -96.95018
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+20 approach)
Design loadHS 20
Structure length1,925 ft (586.7 m)
Longest span204 ft (62.2 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic24,021 (2019)
Projected traffic33,629 by 2030
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

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 IH 20 Conn G over IH 20/SPUR 408 built?

It was built in 1975, making it 50 years old in 2025.

What condition is IH 20 Conn G over IH 20/SPUR 408 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 September 2023.

How much traffic does IH 20 Conn G over IH 20/SPUR 408 carry?

About 24,021 vehicles per day (2019 count).

How long is IH 20 Conn G over IH 20/SPUR 408?

The structure is 1,925 ft (586.7 m) long with a longest span of 204 ft (62.2 m) and a deck 32 ft wide.

Who owns IH 20 Conn G over IH 20/SPUR 408?

It is owned by the State Highway Agency.