US Bridges

US 77 NB over Spur 56

Good

Willacy County, Texas · 1.15 MI S of FM 490 · Structure no. 212450032710220

Built
2013
12 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
1 main span
Daily traffic
10,638
2023 count
Owner
State
State Highway Agency

About this bridge

US 77 NB over Spur 56 is a prestressed concrete stringer/multi-beam or girder carrying US 77 NB over Spur 56 in Willacy County, Texas. It was built in 2013, so it is 12 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 10,638 vehicles a day, roughly 5% of them trucks, projected to reach 23,900 by 2031. The structure is 200 ft (61 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 77 NB
CrossesSpur 56
Location1.15 MI S of FM 490
RouteU.S. Route 77
StateTexas
Coordinates26.43719, -97.78489
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 length200 ft (61 m)
Longest span112 ft (34.1 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,638 (2023)
Projected traffic23,900 by 2031
Trucks5%
Lanes on structure2
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 77 NB over Spur 56 built?

It was built in 2013, making it 12 years old in 2025.

What condition is US 77 NB over Spur 56 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 February 2023.

How much traffic does US 77 NB over Spur 56 carry?

About 10,638 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 77 NB over Spur 56?

The structure is 200 ft (61 m) long with a longest span of 112 ft (34.1 m) and a deck 40 ft wide.

Who owns US 77 NB over Spur 56?

It is owned by the State Highway Agency.