US Bridges

Thompson Road over Lnva Canal

Fair

Jefferson County, Texas · 1.1 MI S of US 90 · Structure no. 201240AA0132002

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
74 ft
9 main spans
Daily traffic
100
2016 count
Owner
County
County Highway Agency

About this bridge

Thompson Road over Lnva Canal is a concrete culvert carrying Thompson Road over Lnva Canal in Jefferson County, Texas. It was built in 1970, so it is 55 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 100 vehicles a day, projected to reach 60 by 2035. The structure is 74 ft (22.6 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesThompson Road
CrossesLnva Canal
Location1.1 MI S of US 90
RouteCounty Highway 0
CountyJefferson County
StateTexas
Coordinates30.02414, -94.38596
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable 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 typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadUnknown
Structure length74 ft (22.6 m)
Longest span7 ft (2.1 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2016)
Projected traffic60 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Thompson Road over Lnva Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is Thompson Road over Lnva Canal 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 July 2023.

How much traffic does Thompson Road over Lnva Canal carry?

About 100 vehicles per day (2016 count).

How long is Thompson Road over Lnva Canal?

The structure is 74 ft (22.6 m) long with a longest span of 7 ft (2.1 m) and a deck 36 ft wide.

Who owns Thompson Road over Lnva Canal?

It is owned by the County Highway Agency.