US Bridges

SW 39th ST over Zarzamora Creek

Fair

Bexar County, Texas · 0.27 MI S of W Commerce · Structure no. 150150B34065001

Built
1989
36 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
140 ft
2 main spans
Daily traffic
2,273
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW 39th ST over Zarzamora Creek is a prestressed concrete stringer/multi-beam or girder carrying SW 39th ST over Zarzamora Creek in Bexar County, Texas. It was built in 1989, so it is 36 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 2,273 vehicles a day, projected to reach 500 by 2038. The structure is 140 ft (42.7 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSW 39th ST
CrossesZarzamora Creek
Location0.27 MI S of W Commerce
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.42914, -98.57929
Functional classUrban Local

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length140 ft (42.7 m)
Longest span70 ft (21.3 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,273 (2020)
Projected traffic500 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 39th ST over Zarzamora Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is SW 39th ST over Zarzamora Creek 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 2023.

How much traffic does SW 39th ST over Zarzamora Creek carry?

About 2,273 vehicles per day (2020 count).

How long is SW 39th ST over Zarzamora Creek?

The structure is 140 ft (42.7 m) long with a longest span of 70 ft (21.3 m) and a deck 42 ft wide.

Who owns SW 39th ST over Zarzamora Creek?

It is owned by the City or Municipal Highway Agency.