US Bridges

FM 3487 (culebra) over Leon Creek

Fair

Bexar County, Texas · 0.2 MI W of IH 410 · Structure no. 150150234401001

Built
1958
67 years old, rebuilt 1987
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
328 ft
8 main spans
Daily traffic
43,280
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

FM 3487 (culebra) over Leon Creek is a concrete slab carrying FM 3487 (culebra) over Leon Creek in Bexar County, Texas. It was built in 1958 and reconstructed in 1987, so it is 67 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 5 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 43,280 vehicles a day, roughly 1% of them trucks, projected to reach 53,200 by 2031. The structure is 328 ft (100 m) long and 102 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFM 3487 (culebra)
CrossesLeon Creek
Location0.2 MI W of IH 410
RouteState Highway 3487
CountyBexar County
StateTexas
Coordinates29.45423, -98.63239
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 20
Structure length328 ft (100 m)
Longest span41 ft (12.5 m)
Deck width102 ft (31.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,280 (2022)
Projected traffic53,200 by 2031
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 FM 3487 (culebra) over Leon Creek built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1987.

What condition is FM 3487 (culebra) over Leon 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 June 2023.

How much traffic does FM 3487 (culebra) over Leon Creek carry?

About 43,280 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is FM 3487 (culebra) over Leon Creek?

The structure is 328 ft (100 m) long with a longest span of 41 ft (12.5 m) and a deck 102 ft wide.

Who owns FM 3487 (culebra) over Leon Creek?

It is owned by the City or Municipal Highway Agency.