US Bridges

Oak Knoll DR over Zarzamora Creek

Good

Bexar County, Texas · 1.20 MI W of Shrrril Brk · Structure no. 150150B25210002

Built
1999
26 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
160 ft
5 main spans
Daily traffic
850
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Knoll DR over Zarzamora Creek is a concrete continuous slab carrying Oak Knoll DR over Zarzamora Creek in Bexar County, Texas. It was built in 1999, so it is 26 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 850 vehicles a day, projected to reach 1,000 by 2033. The structure is 160 ft (48.8 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOak Knoll DR
CrossesZarzamora Creek
Location1.20 MI W of Shrrril Brk
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.47144, -98.59865
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than 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 rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span34 ft (10.4 m)
Deck width41 ft (12.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2020)
Projected traffic1,000 by 2033
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 Oak Knoll DR over Zarzamora Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is Oak Knoll DR over Zarzamora Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Oak Knoll DR over Zarzamora Creek carry?

About 850 vehicles per day (2020 count).

How long is Oak Knoll DR over Zarzamora Creek?

The structure is 160 ft (48.8 m) long with a longest span of 34 ft (10.4 m) and a deck 41 ft wide.

Who owns Oak Knoll DR over Zarzamora Creek?

It is owned by the City or Municipal Highway Agency.