US Bridges

US 77 NB over Peters Swale

Fair

San Patricio County, Texas · 1.6 MI SW of FM 1945 · Structure no. 162050037201001

Built
1930
95 years old, rebuilt 1952
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
71 ft
11 main spans
Daily traffic
8,433
2022 count
Owner
State
State Highway Agency

About this bridge

US 77 NB over Peters Swale is a concrete culvert carrying US 77 NB over Peters Swale in San Patricio County, Texas. It was built in 1930 and reconstructed in 1952, so it is 95 years old, older 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 5 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 8,433 vehicles a day, roughly 31% of them trucks, projected to reach 11,131 by 2042. The structure is 71 ft (21.6 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 77 NB
CrossesPeters Swale
Location1.6 MI SW of FM 1945
RouteU.S. Route 77
CountySan Patricio County
StateTexas
Coordinates27.99209, -97.54556
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadH 15
Structure length71 ft (21.6 m)
Longest span6 ft (1.8 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,433 (2022)
Projected traffic11,131 by 2042
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 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 NB over Peters Swale built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1952.

What condition is US 77 NB over Peters Swale 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 January 2024.

How much traffic does US 77 NB over Peters Swale carry?

About 8,433 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is US 77 NB over Peters Swale?

The structure is 71 ft (21.6 m) long with a longest span of 6 ft (1.8 m) and a deck 46 ft wide.

Who owns US 77 NB over Peters Swale?

It is owned by the State Highway Agency.