US Bridges

NW 36th ST over Zarzamora Creek

Fair

Bexar County, Texas · 0.55 MI N of W Commerce · Structure no. 150150B34050008

Built
1981
44 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
186 ft
3 main spans
Daily traffic
11,322
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 36th ST over Zarzamora Creek is a prestressed concrete box beam or girders - multiple carrying NW 36th ST over Zarzamora Creek in Bexar County, Texas. It was built in 1981, so it is 44 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 11,322 vehicles a day, projected to reach 21,000 by 2038. The structure is 186 ft (56.7 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 36th ST
CrossesZarzamora Creek
Location0.55 MI N of W Commerce
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.44044, -98.57038
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span62 ft (18.9 m)
Deck width54 ft (16.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,322 (2020)
Projected traffic21,000 by 2038
Trucks0%
Lanes on structure4
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$20,000
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 36th ST over Zarzamora Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is NW 36th 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 36th ST over Zarzamora Creek carry?

About 11,322 vehicles per day (2020 count).

How long is NW 36th ST over Zarzamora Creek?

The structure is 186 ft (56.7 m) long with a longest span of 62 ft (18.9 m) and a deck 54 ft wide.

Who owns NW 36th ST over Zarzamora Creek?

It is owned by the City or Municipal Highway Agency.