US Bridges

US 77 NB over Runnels ST (fr T/A)

Fair

Cameron County, Texas · 1.05 MI NW of SH 100 · Structure no. 210310003908224

Built
1983
42 years old, rebuilt 2005
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
37,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 77 NB over Runnels ST (fr T/A) is a prestressed concrete stringer/multi-beam or girder carrying US 77 NB over Runnels ST (fr T/A) in Cameron County, Texas. It was built in 1983 and reconstructed in 2005, so it is 42 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 37,000 vehicles a day, roughly 8% of them trucks, projected to reach 35,250 by 2031. The structure is 150 ft (45.7 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 77 NB
CrossesRunnels ST (fr T/A)
Location1.05 MI NW of SH 100
RouteU.S. Route 77
CountyCameron County
StateTexas
Coordinates26.09413, -97.58976
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionFebruary 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 loadHS 20
Structure length150 ft (45.7 m)
Longest span60 ft (18.3 m)
Deck width57 ft (17.3 m)
Roadway width55 ft (16.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2023)
Projected traffic35,250 by 2031
Trucks8%
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 Runnels ST (fr T/A) built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 2005.

What condition is US 77 NB over Runnels ST (fr T/A) 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 February 2023.

How much traffic does US 77 NB over Runnels ST (fr T/A) carry?

About 37,000 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 77 NB over Runnels ST (fr T/A)?

The structure is 150 ft (45.7 m) long with a longest span of 60 ft (18.3 m) and a deck 57 ft wide.

Who owns US 77 NB over Runnels ST (fr T/A)?

It is owned by the State Highway Agency.