SH 16 over Arroyo Indio

Good

Zapata County, Texas · 0.9 MI E of US 83 · Structure no. 212530051707055

Built: 1954; 71 years old, rebuilt 2009
Condition: Good; inspected April 2023
Type: Culvert; Concrete
Length: 33 ft; 3 main spans
Daily traffic: 10,399; 2024 count
Owner: State; State Highway Agency

About this bridge

SH 16 over Arroyo Indio is a concrete culvert carrying SH 16 over Arroyo Indio in Zapata County, Texas. It was built in 1954 and reconstructed in 2009, so it is 71 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 10,399 vehicles a day, roughly 20% of them trucks, projected to reach 14,190 by 2033. The structure is 33 ft (10.1 m) long and 91 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps

CarriesSH 16

CrossesArroyo Indio

Location0.9 MI E of US 83

RouteState Highway 16

CountyZapata County

StateTexas

Coordinates26.91457, -99.26072

Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	7 Good	Some minor problems.

Last inspectionApril 2023

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 geometry4: Meets minimum tolerable limits to be left in place as is

Waterway adequacy9: Superior to present desirable 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 spans3

Design loadOther

Structure length33 ft (10.1 m)

Longest span10 ft (3 m)

Deck width91 ft (27.8 m)

Roadway width64 ft (19.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,399 (2024)

Projected traffic14,190 by 2033

Trucks20%

Lanes on structure5

Traffic directionTwo-way traffic

CarriesHighway and pedestrian

CrossesWaterway

Detour if closed13 mi (21 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 SH 16 over Arroyo Indio built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2009.

What condition is SH 16 over Arroyo Indio 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 April 2023.

How much traffic does SH 16 over Arroyo Indio carry?

About 10,399 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is SH 16 over Arroyo Indio?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 91 ft wide.

Who owns SH 16 over Arroyo Indio?

It is owned by the State Highway Agency.