US Bridges

Llano ST over Vince Bayou

FairPosted for load

Harris County, Texas · 0.80 MI E of Allen Genoa · Structure no. 121020C01901001

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
92 ft
3 main spans
Daily traffic
1,010
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Llano ST over Vince Bayou is a concrete stringer/multi-beam or girder carrying Llano ST over Vince Bayou in Harris County, Texas. It was built in 1971, so it is 54 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. Its operating status is: posted for load restriction.

It carries about 1,010 vehicles a day, projected to reach 1,200 by 2031. The structure is 92 ft (28 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLlano ST
CrossesVince Bayou
Location0.80 MI E of Allen Genoa
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.65426, -95.19427
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length92 ft (28 m)
Longest span30 ft (9.1 m)
Deck width37 ft (11.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,010 (2011)
Projected traffic1,200 by 2031
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Llano ST over Vince Bayou built?

It was built in 1971, making it 54 years old in 2025.

What condition is Llano ST over Vince Bayou 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 August 2023.

How much traffic does Llano ST over Vince Bayou carry?

About 1,010 vehicles per day (2011 count).

How long is Llano ST over Vince Bayou?

The structure is 92 ft (28 m) long with a longest span of 30 ft (9.1 m) and a deck 37 ft wide.

Who owns Llano ST over Vince Bayou?

It is owned by the Town or Township Highway Agency.