US Bridges

SH 105 over Lnva Canal

Fair

Jefferson County, Texas · 0.9 MI W of US 69 · Structure no. 201240033905008

Built
1940
85 years old, rebuilt 1992
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
200 ft
10 main spans
Daily traffic
22,086
2022 count
Owner
State
State Highway Agency

About this bridge

SH 105 over Lnva Canal is a concrete slab carrying SH 105 over Lnva Canal in Jefferson County, Texas. It was built in 1940 and reconstructed in 1992, so it is 85 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 22,086 vehicles a day, roughly 9% of them trucks, projected to reach 30,920 by 2042. The structure is 200 ft (61 m) long and 70 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSH 105
CrossesLnva Canal
Location0.9 MI W of US 69
RouteState Highway 105
CountyJefferson County
StateTexas
Coordinates30.13323, -94.18272
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadH 15
Structure length200 ft (61 m)
Longest span20 ft (6.1 m)
Deck width70 ft (21.3 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,086 (2022)
Projected traffic30,920 by 2042
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 105 over Lnva Canal built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1992.

What condition is SH 105 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 May 2024.

How much traffic does SH 105 over Lnva Canal carry?

About 22,086 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is SH 105 over Lnva Canal?

The structure is 200 ft (61 m) long with a longest span of 20 ft (6.1 m) and a deck 70 ft wide.

Who owns SH 105 over Lnva Canal?

It is owned by the State Highway Agency.