US Bridges

Delgado ST over Alazan Creek

Fair

Bexar County, Texas · 0.10 MI W of Zarzamora · Structure no. 150150B09270002

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
134 ft
4 main spans
Daily traffic
727
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Delgado ST over Alazan Creek is a concrete continuous slab carrying Delgado ST over Alazan Creek in Bexar County, Texas. It was built in 1965, so it is 60 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 727 vehicles a day, projected to reach 1,190 by 2031. The structure is 134 ft (40.8 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesDelgado ST
CrossesAlazan Creek
Location0.10 MI W of Zarzamora
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.43868, -98.52707
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
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 typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length134 ft (40.8 m)
Longest span35 ft (10.7 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic727 (2020)
Projected traffic1,190 by 2031
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 Delgado ST over Alazan Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Delgado ST over Alazan 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 May 2023.

How much traffic does Delgado ST over Alazan Creek carry?

About 727 vehicles per day (2020 count).

How long is Delgado ST over Alazan Creek?

The structure is 134 ft (40.8 m) long with a longest span of 35 ft (10.7 m) and a deck 42 ft wide.

Who owns Delgado ST over Alazan Creek?

It is owned by the City or Municipal Highway Agency.