US Bridges

FM 511 NB over SH 550

Fair

Cameron County, Texas · 7.7 MI SE of US 77 · Structure no. 210310068401256

Built
2009
16 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
338 ft
3 main spans
Daily traffic
11,616
2024 count
Owner
State
State Highway Agency

About this bridge

FM 511 NB over SH 550 is a prestressed concrete stringer/multi-beam or girder carrying FM 511 NB over SH 550 in Cameron County, Texas. It was built in 2009, so it is 16 years old, younger 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 11,616 vehicles a day, roughly 12% of them trucks, projected to reach 10,470 by 2033. The structure is 338 ft (103 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesFM 511 NB
CrossesSH 550
Location7.7 MI SE of US 77
RouteState Highway 511
CountyCameron County
StateTexas
Coordinates25.97801, -97.43681
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length338 ft (103 m)
Longest span122 ft (37.2 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,616 (2024)
Projected traffic10,470 by 2033
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 511 NB over SH 550 built?

It was built in 2009, making it 16 years old in 2025.

What condition is FM 511 NB over SH 550 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 March 2023.

How much traffic does FM 511 NB over SH 550 carry?

About 11,616 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is FM 511 NB over SH 550?

The structure is 338 ft (103 m) long with a longest span of 122 ft (37.2 m) and a deck 40 ft wide.

Who owns FM 511 NB over SH 550?

It is owned by the State Highway Agency.