US Bridges

US 77 NB over Carmen RD

Good

Cameron County, Texas · 2.05 MI SE of SH 100 · Structure no. 210310003908354

Built
2007
18 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
1 main span
Daily traffic
30,029
2023 count
Owner
State
State Highway Agency

About this bridge

US 77 NB over Carmen RD is a prestressed concrete stringer/multi-beam or girder carrying US 77 NB over Carmen RD in Cameron County, Texas. It was built in 2007, so it is 18 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30,029 vehicles a day, roughly 9% of them trucks, projected to reach 30,670 by 2031. The structure is 225 ft (68.6 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 77 NB
CrossesCarmen RD
Location2.05 MI SE of SH 100
RouteU.S. Route 77
StateTexas
Coordinates26.05634, -97.56206
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHL 93
Structure length225 ft (68.6 m)
Longest span95 ft (29 m)
Deck width58 ft (17.7 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,029 (2023)
Projected traffic30,670 by 2031
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US 77 NB over Carmen RD built?

It was built in 2007, making it 18 years old in 2025.

What condition is US 77 NB over Carmen RD in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does US 77 NB over Carmen RD carry?

About 30,029 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 77 NB over Carmen RD?

The structure is 225 ft (68.6 m) long with a longest span of 95 ft (29 m) and a deck 58 ft wide.

Who owns US 77 NB over Carmen RD?

It is owned by the State Highway Agency.