US Bridges

IH 37 NB over Spur 459

Fair

San Patricio County, Texas · 1.6 MI SE of SH 359 · Structure no. 162050007403124

Built
1971
54 years old
Condition
Fair
inspected April 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
4 main spans
Daily traffic
10,694
2019 count
Owner
State
State Highway Agency

About this bridge

IH 37 NB over Spur 459 is a prestressed concrete stringer/multi-beam or girder carrying IH 37 NB over Spur 459 in San Patricio County, Texas. It was built in 1971, so it is 54 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 10,694 vehicles a day, roughly 22% of them trucks, projected to reach 15,570 by 2033. The structure is 240 ft (73.2 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 37 NB
CrossesSpur 459
Location1.6 MI SE of SH 359
RouteInterstate 37
CountySan Patricio County
StateTexas
Coordinates28.09103, -97.80961
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 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 length240 ft (73.2 m)
Longest span60 ft (18.3 m)
Deck width44 ft (13.5 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,694 (2019)
Projected traffic15,570 by 2033
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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 Spur 459 built?

It was built in 1971, making it 54 years old in 2025.

What condition is IH 37 NB over Spur 459 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 April 2022.

How much traffic does IH 37 NB over Spur 459 carry?

About 10,694 vehicles per day (2019 count), of which roughly 22% are trucks.

How long is IH 37 NB over Spur 459?

The structure is 240 ft (73.2 m) long with a longest span of 60 ft (18.3 m) and a deck 44 ft wide.

Who owns IH 37 NB over Spur 459?

It is owned by the State Highway Agency.