Structure 150150B38345001 · Bexar County, TX

N Zarzamora ST over Alazan Creek

Carries N Zarzamora ST over Alazan Creek, 0.50 Mi S Of Lp 421.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT130 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

130 ft end to end, longest span 32 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 slab bridge.

Built196561 years old
Length129.9 ft39.6 m
Daily traffic14,571counted 2020
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyBexar
Location0.50 Mi S Of Lp 421
CarriesN Zarzamora ST
CrossesAlazan Creek
Coordinates29.43759, -98.52584

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length129.9 ft (39.6 m)
Max Span32.2 ft (9.8 m)
Deck Width56.4 ft (17.2 m)
Deck Area681.1 sq m
Main Spans4
Year Built1965

Traffic

Avg Daily Traffic14,571 (2020)
Truck Traffic1%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical9 — Foundation above flood level
Structure Number150150B38345001

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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