US Bridges

Hemphill DR over Zarzamora Creek

Fair

Bexar County, Texas · 0.2 MI East of Callaghan · Structure no. 150150B15810001

Built
1988
37 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
225 ft
5 main spans
Daily traffic
4,328
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hemphill DR over Zarzamora Creek is a prestressed concrete box beam or girders - multiple carrying Hemphill DR over Zarzamora Creek in Bexar County, Texas. It was built in 1988, so it is 37 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 4,328 vehicles a day, projected to reach 6,059 by 2042. The structure is 225 ft (68.6 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHemphill DR
CrossesZarzamora Creek
Location0.2 MI East of Callaghan
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.45621, -98.59809
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than 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 spans5
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span45 ft (13.7 m)
Deck width58 ft (17.8 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,328 (2020)
Projected traffic6,059 by 2042
Trucks0%
Lanes on structure3
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$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hemphill DR over Zarzamora Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Hemphill DR 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 November 2024.

How much traffic does Hemphill DR over Zarzamora Creek carry?

About 4,328 vehicles per day (2020 count).

How long is Hemphill DR over Zarzamora Creek?

The structure is 225 ft (68.6 m) long with a longest span of 45 ft (13.7 m) and a deck 58 ft wide.

Who owns Hemphill DR over Zarzamora Creek?

It is owned by the City or Municipal Highway Agency.