US Bridges

IH 410 Ml over FM 3487 (culebra Rd)

Fair

Bexar County, Texas · 2.7 MI SW of SH 16 · Structure no. 150150052104020

Built
1956
69 years old, rebuilt 1988
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
202 ft
4 main spans
Daily traffic
172,438
2020 count
Owner
State
State Highway Agency

About this bridge

IH 410 Ml over FM 3487 (culebra Rd) is a steel continuous stringer/multi-beam or girder carrying IH 410 Ml over FM 3487 (culebra Rd) in Bexar County, Texas. It was built in 1956 and reconstructed in 1988, so it is 69 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 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 172,438 vehicles a day, roughly 16% of them trucks, projected to reach 96,540 by 2033. The structure is 202 ft (61.6 m) long and 178 ft wide.

Location

Open in Google Maps
CarriesIH 410 Ml
CrossesFM 3487 (culebra Rd)
Location2.7 MI SW of SH 16
RouteInterstate 410
CountyBexar County
StateTexas
Coordinates29.45318, -98.63009
Functional classUrban Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length202 ft (61.6 m)
Longest span55 ft (16.8 m)
Deck width178 ft (54.3 m)
Roadway width173 ft (52.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172,438 (2020)
Projected traffic96,540 by 2033
Trucks16%
Lanes on structure12
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 410 Ml over FM 3487 (culebra Rd) built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1988.

What condition is IH 410 Ml over FM 3487 (culebra Rd) 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 2024.

How much traffic does IH 410 Ml over FM 3487 (culebra Rd) carry?

About 172,438 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is IH 410 Ml over FM 3487 (culebra Rd)?

The structure is 202 ft (61.6 m) long with a longest span of 55 ft (16.8 m) and a deck 178 ft wide.

Who owns IH 410 Ml over FM 3487 (culebra Rd)?

It is owned by the State Highway Agency.