US Bridges

IH 37 NB over Loop 13

Fair

Bexar County, Texas · 4.30 MI S of IH 10 · Structure no. 150150007308202

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
250 ft
4 main spans
Daily traffic
37,396
2019 count
Owner
State
State Highway Agency

About this bridge

IH 37 NB over Loop 13 is a steel continuous stringer/multi-beam or girder carrying IH 37 NB over Loop 13 in Bexar County, Texas. It was built in 1969, so it is 56 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 37,396 vehicles a day, roughly 3% of them trucks, projected to reach 45,380 by 2033. The structure is 250 ft (76.2 m) long and 42 ft wide.

CarriesIH 37 NB
CrossesLoop 13
Location4.30 MI S of IH 10
RouteInterstate 37
StateTexas
Coordinates29.35277, -98.428
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 rating57 US tons
Inventory rating34 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span70 ft (21.3 m)
Deck width42 ft (12.9 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,396 (2019)
Projected traffic45,380 by 2033
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 37 NB over Loop 13 built?

It was built in 1969, making it 56 years old in 2025.

What condition is IH 37 NB over Loop 13 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 August 2024.

How much traffic does IH 37 NB over Loop 13 carry?

About 37,396 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is IH 37 NB over Loop 13?

The structure is 250 ft (76.2 m) long with a longest span of 70 ft (21.3 m) and a deck 42 ft wide.

Who owns IH 37 NB over Loop 13?

It is owned by the State Highway Agency.