US Bridges

NW 34th ST over Zarzamora Creek

Fair

Bexar County, Texas · 0.55 MI N of W Commerce · Structure no. 150150B34040001

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
181 ft
3 main spans
Daily traffic
1,538
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 34th ST over Zarzamora Creek is a prestressed concrete box beam or girders - multiple carrying NW 34th ST over Zarzamora Creek in Bexar County, Texas. It was built in 1975, so it is 50 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 1,538 vehicles a day, projected to reach 3,500 by 2038. The structure is 181 ft (55.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 34th ST
CrossesZarzamora Creek
Location0.55 MI N of W Commerce
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.43996, -98.56596
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length181 ft (55.2 m)
Longest span60 ft (18.3 m)
Deck width42 ft (12.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,538 (2020)
Projected traffic3,500 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 34th ST over Zarzamora Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is NW 34th 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 NW 34th ST over Zarzamora Creek carry?

About 1,538 vehicles per day (2020 count).

How long is NW 34th ST over Zarzamora Creek?

The structure is 181 ft (55.2 m) long with a longest span of 60 ft (18.3 m) and a deck 42 ft wide.

Who owns NW 34th ST over Zarzamora Creek?

It is owned by the City or Municipal Highway Agency.