US Bridges

Spur 366 Conn over US 75 SB

Fair

Dallas County, Texas · US 75 & SP 366 Intrchange · Structure no. 180570004707421

Built
1999
26 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
810 ft
2 main spans
Daily traffic
10,490
2016 count
Owner
State
State Highway Agency

About this bridge

Spur 366 Conn over US 75 SB is a steel continuous stringer/multi-beam or girder carrying Spur 366 Conn over US 75 SB in Dallas County, Texas. It was built in 1999, so it is 26 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 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 10,490 vehicles a day, projected to reach 19,930 by 2038. The structure is 810 ft (246.9 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSpur 366 Conn
CrossesUS 75 SB
LocationUS 75 & SP 366 Intrchange
RouteState Highway 366
CountyDallas County
StateTexas
Coordinates32.79441, -96.79489
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2 (+6 approach)
Design loadHS 20
Structure length810 ft (246.9 m)
Longest span149 ft (45.4 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic10,490 (2016)
Projected traffic19,930 by 2038
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Spur 366 Conn over US 75 SB built?

It was built in 1999, making it 26 years old in 2025.

What condition is Spur 366 Conn over US 75 SB 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 May 2024.

How much traffic does Spur 366 Conn over US 75 SB carry?

About 10,490 vehicles per day (2016 count).

How long is Spur 366 Conn over US 75 SB?

The structure is 810 ft (246.9 m) long with a longest span of 149 ft (45.4 m) and a deck 28 ft wide.

Who owns Spur 366 Conn over US 75 SB?

It is owned by the State Highway Agency.