US Bridges

Clark Rd/Spur 408 over IH 20

Fair

Dallas County, Texas · IH-20 @ Spur 408 · Structure no. 180570237404302

Built
1990
35 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,635 ft
3 main spans
Daily traffic
16,528
2019 count
Owner
State
State Highway Agency

About this bridge

Clark Rd/Spur 408 over IH 20 is a steel continuous stringer/multi-beam or girder carrying Clark Rd/Spur 408 over IH 20 in Dallas County, Texas. It was built in 1990, so it is 35 years old, younger 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 16,528 vehicles a day, projected to reach 23,139 by 2040. The structure is 1,635 ft (498.3 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesClark Rd/Spur 408
CrossesIH 20
LocationIH-20 @ Spur 408
RouteState Highway 0
CountyDallas County
StateTexas
Coordinates32.67359, -96.94685
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
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 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+11 approach)
Design loadHS 20
Structure length1,635 ft (498.3 m)
Longest span175 ft (53.3 m)
Deck width80 ft (24.4 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,528 (2019)
Projected traffic23,139 by 2040
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesFourth level (interchange)
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Clark Rd/Spur 408 over IH 20 built?

It was built in 1990, making it 35 years old in 2025.

What condition is Clark Rd/Spur 408 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 September 2023.

How much traffic does Clark Rd/Spur 408 over IH 20 carry?

About 16,528 vehicles per day (2019 count).

How long is Clark Rd/Spur 408 over IH 20?

The structure is 1,635 ft (498.3 m) long with a longest span of 175 ft (53.3 m) and a deck 80 ft wide.

Who owns Clark Rd/Spur 408 over IH 20?

It is owned by the State Highway Agency.