US Bridges

9th Ave NB over Main B Canal

Good

Jefferson County, Texas · 1.0 MI SE of JCT FM 365 · Structure no. 201240C00316001

Built
1980
45 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
6,853
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

9th Ave NB over Main B Canal is a prestressed concrete box beam or girders - multiple carrying 9th Ave NB over Main B Canal in Jefferson County, Texas. It was built in 1980, so it is 45 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,853 vehicles a day, roughly 3% of them trucks, projected to reach 9,595 by 2039. The structure is 86 ft (26.2 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries9th Ave NB
CrossesMain B Canal
Location1.0 MI SE of JCT FM 365
RouteCity Street 0
CountyJefferson County
StateTexas
Coordinates29.94558, -93.97362
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span86 ft (26.2 m)
Deck width36 ft (11.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,853 (2019)
Projected traffic9,595 by 2039
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$5,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 9th Ave NB over Main B Canal built?

It was built in 1980, making it 45 years old in 2025.

What condition is 9th Ave NB over Main B Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does 9th Ave NB over Main B Canal carry?

About 6,853 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is 9th Ave NB over Main B Canal?

The structure is 86 ft (26.2 m) long with a longest span of 86 ft (26.2 m) and a deck 36 ft wide.

Who owns 9th Ave NB over Main B Canal?

It is owned by the City or Municipal Highway Agency.