US Bridges

SH 359 over Tynan Creek

Fair

San Patricio County, Texas · 5.0 MI NE of IH 37 · Structure no. 162050008704017

Built
1931
94 years old, rebuilt 1990
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
23 ft
5 main spans
Daily traffic
5,775
2022 count
Owner
State
State Highway Agency

About this bridge

SH 359 over Tynan Creek is a concrete culvert carrying SH 359 over Tynan Creek in San Patricio County, Texas. It was built in 1931 and reconstructed in 1990, so it is 94 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 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 5,775 vehicles a day, roughly 17% of them trucks, projected to reach 8,085 by 2042. The structure is 23 ft (7 m) long and 53 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSH 359
CrossesTynan Creek
Location5.0 MI NE of IH 37
RouteState Highway 359
CountySan Patricio County
StateTexas
Coordinates28.16406, -97.76226
Functional classRural Minor Arterial

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 geometry6: Equal to present minimum 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
DeckNot applicable
Main spans5
Design loadH 15
Structure length23 ft (7 m)
Longest span4 ft (1.2 m)
Deck width53 ft (16.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,775 (2022)
Projected traffic8,085 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 SH 359 over Tynan Creek built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1990.

What condition is SH 359 over Tynan Creek 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 April 2024.

How much traffic does SH 359 over Tynan Creek carry?

About 5,775 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is SH 359 over Tynan Creek?

The structure is 23 ft (7 m) long with a longest span of 4 ft (1.2 m) and a deck 53 ft wide.

Who owns SH 359 over Tynan Creek?

It is owned by the State Highway Agency.