US Bridges

Zinnia Rd(cr 2100) over Willacy Main Drain

Fair

Willacy County, Texas · 1.5 MI E of JCT US 77 · Structure no. 212450AA0199001

Built
1984
41 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
24
2019 count
Owner
County
County Highway Agency

About this bridge

Zinnia Rd(cr 2100) over Willacy Main Drain is a prestressed concrete box beam or girders - multiple carrying Zinnia Rd(cr 2100) over Willacy Main Drain in Willacy County, Texas. It was built in 1984, so it is 41 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 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 24 vehicles a day, roughly 3% of them trucks, projected to reach 38 by 2042. The structure is 42 ft (12.8 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesZinnia Rd(cr 2100)
CrossesWillacy Main Drain
Location1.5 MI E of JCT US 77
RouteCounty Highway 2100
CountyWillacy County
StateTexas
Coordinates26.42278, -97.76014
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2019)
Projected traffic38 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Zinnia Rd(cr 2100) over Willacy Main Drain built?

It was built in 1984, making it 41 years old in 2025.

What condition is Zinnia Rd(cr 2100) over Willacy Main Drain 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 Zinnia Rd(cr 2100) over Willacy Main Drain carry?

About 24 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Zinnia Rd(cr 2100) over Willacy Main Drain?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Zinnia Rd(cr 2100) over Willacy Main Drain?

It is owned by the County Highway Agency.