US Bridges

IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc

Fair

Bexar County, Texas · IH 35 & IH 37 Interchange · Structure no. 150150001710300

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
883 ft
10 main spans
Daily traffic
20,861
2022 count
Owner
State
State Highway Agency

About this bridge

IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc is a steel continuous stringer/multi-beam or girder carrying IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc in Bexar County, Texas. It was built in 1972, so it is 53 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 20,861 vehicles a day, roughly 11% of them trucks, projected to reach 97,300 by 2031. The structure is 883 ft (269.1 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesIH 37 NB Conn 3
CrossesIH 35 NB Conn 2 Etc
LocationIH 35 & IH 37 Interchange
RouteInterstate 37
CountyBexar County
StateTexas
Coordinates29.43958, -98.48029
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10 (+1 approach)
Design loadHS 20
Structure length883 ft (269.1 m)
Longest span95 ft (29 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic20,861 (2022)
Projected traffic97,300 by 2031
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed98.8 mi (159 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc built?

It was built in 1972, making it 53 years old in 2025.

What condition is IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc 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 June 2024.

How much traffic does IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc carry?

About 20,861 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc?

The structure is 883 ft (269.1 m) long with a longest span of 95 ft (29 m) and a deck 26 ft wide.

Who owns IH 37 NB Conn 3 over IH 35 NB Conn 2 Etc?

It is owned by the State Highway Agency.