US Bridges

SP 408 NB over SP 303 (kiest Blvd)

Fair

Dallas County, Texas · 1.70 MI W of Lp 12 · Structure no. 180570220802007

Built
1975
50 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
276 ft
4 main spans
Daily traffic
41,760
2013 count
Owner
State
State Highway Agency

About this bridge

SP 408 NB over SP 303 (kiest Blvd) is a prestressed concrete stringer/multi-beam or girder carrying SP 408 NB over SP 303 (kiest Blvd) 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 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 41,760 vehicles a day, roughly 7% of them trucks, projected to reach 58,460 by 2033. The structure is 276 ft (84.1 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesSP 408 NB
CrossesSP 303 (kiest Blvd)
Location1.70 MI W of Lp 12
RouteState Highway 408
CountyDallas County
StateTexas
Coordinates32.70525, -96.93293
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than 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 spans4
Design loadHS 20
Structure length276 ft (84.1 m)
Longest span78 ft (23.8 m)
Deck width62 ft (18.9 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,760 (2013)
Projected traffic58,460 by 2033
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 SP 408 NB over SP 303 (kiest Blvd) built?

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

What condition is SP 408 NB over SP 303 (kiest Blvd) 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 December 2023.

How much traffic does SP 408 NB over SP 303 (kiest Blvd) carry?

About 41,760 vehicles per day (2013 count), of which roughly 7% are trucks.

How long is SP 408 NB over SP 303 (kiest Blvd)?

The structure is 276 ft (84.1 m) long with a longest span of 78 ft (23.8 m) and a deck 62 ft wide.

Who owns SP 408 NB over SP 303 (kiest Blvd)?

It is owned by the State Highway Agency.