US Bridges

US 77 Nbfr over Tranquitas Creek

Good

Kleberg County, Texas · 0.3 MI N of SH 141 · Structure no. 161370010204066

Built
1970
55 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
160 ft
4 main spans
Daily traffic
1,494
2024 count
Owner
State
State Highway Agency

About this bridge

US 77 Nbfr over Tranquitas Creek is a concrete stringer/multi-beam or girder carrying US 77 Nbfr over Tranquitas Creek in Kleberg County, Texas. It was built in 1970, so it is 55 years old, older 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 1,494 vehicles a day, roughly 13% of them trucks, projected to reach 3,720 by 2042. The structure is 160 ft (48.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 77 Nbfr
CrossesTranquitas Creek
Location0.3 MI N of SH 141
RouteU.S. Route 77
StateTexas
Coordinates27.52039, -97.84051
Functional classUrban Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,494 (2024)
Projected traffic3,720 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 77 Nbfr over Tranquitas Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is US 77 Nbfr over Tranquitas Creek 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 June 2024.

How much traffic does US 77 Nbfr over Tranquitas Creek carry?

About 1,494 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is US 77 Nbfr over Tranquitas Creek?

The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns US 77 Nbfr over Tranquitas Creek?

It is owned by the State Highway Agency.