Structure 150150B25210001 · Bexar County, TX

Oak Knoll DR over Trib Of Zarzamora CR

Carries Oak Knoll DR over Trib Of Zarzamora CR, 0.75 Mi W Of Sherrill RD.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT120 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

120 ft end to end, longest span 60 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built200125 years old
Length120.1 ft36.6 m
Daily traffic500counted 2013
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyBexar
Location0.75 Mi W Of Sherrill RD
CarriesOak Knoll DR
CrossesTrib Of Zarzamora CR
Coordinates29.47310, -98.59211

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length120.1 ft (36.6 m)
Max Span60.0 ft (18.3 m)
Deck Width42.7 ft (13 m)
Deck Area475.8 sq m
Main Spans2
Year Built2001

Traffic

Avg Daily Traffic500 (2013)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number150150B25210001

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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