US Bridges

SH 146 over Irrigation Canal

Fair

Chambers County, Texas · 3.2 MI N of IH 10 · Structure no. 200360038902031

Built
1944
81 years old, rebuilt 1990
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
47 ft
7 main spans
Daily traffic
15,026
2022 count
Owner
State
State Highway Agency

About this bridge

SH 146 over Irrigation Canal is a concrete culvert carrying SH 146 over Irrigation Canal in Chambers County, Texas. It was built in 1944 and reconstructed in 1990, so it is 81 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 15,026 vehicles a day, roughly 13% of them trucks, projected to reach 17,360 by 2033. The structure is 47 ft (14.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSH 146
CrossesIrrigation Canal
Location3.2 MI N of IH 10
RouteState Highway 146
CountyChambers County
StateTexas
Coordinates29.86681, -94.89335
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadH 15
Structure length47 ft (14.3 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,026 (2022)
Projected traffic17,360 by 2033
Trucks13%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 146 over Irrigation Canal built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1990.

What condition is SH 146 over Irrigation 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 June 2024.

How much traffic does SH 146 over Irrigation Canal carry?

About 15,026 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is SH 146 over Irrigation Canal?

The structure is 47 ft (14.3 m) long with a longest span of 6 ft (1.8 m).

Who owns SH 146 over Irrigation Canal?

It is owned by the State Highway Agency.