US Bridges

Delaware Avenue over Hillebrandt Bayou

Fair

Jefferson County, Texas · 0.1 MI E of Dowlen RD · Structure no. 201240B00326001

Built
1977
48 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
75 ft
3 main spans
Daily traffic
12,097
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Delaware Avenue over Hillebrandt Bayou is a concrete slab carrying Delaware Avenue over Hillebrandt Bayou in Jefferson County, Texas. It was built in 1977, so it is 48 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 12,097 vehicles a day, projected to reach 20,000 by 2035. The structure is 75 ft (22.9 m) long and 76 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesDelaware Avenue
CrossesHillebrandt Bayou
Location0.1 MI E of Dowlen RD
RouteCity Street 0
CountyJefferson County
StateTexas
Coordinates30.10482, -94.16641
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating52 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length75 ft (22.9 m)
Longest span25 ft (7.6 m)
Deck width76 ft (23.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,097 (2022)
Projected traffic20,000 by 2035
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Delaware Avenue over Hillebrandt Bayou built?

It was built in 1977, making it 48 years old in 2025.

What condition is Delaware Avenue over Hillebrandt 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 July 2023.

How much traffic does Delaware Avenue over Hillebrandt Bayou carry?

About 12,097 vehicles per day (2022 count).

How long is Delaware Avenue over Hillebrandt Bayou?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 76 ft wide.

Who owns Delaware Avenue over Hillebrandt Bayou?

It is owned by the City or Municipal Highway Agency.