US Bridges

Dowlen RD over Hillebrandt Bayou

Fair

Jefferson County, Texas · 1.5 MI SW of US 69 · Structure no. 201240B00359002

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
46 ft
3 main spans
Daily traffic
21,940
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dowlen RD over Hillebrandt Bayou is a concrete culvert carrying Dowlen RD over Hillebrandt Bayou in Jefferson County, Texas. It was built in 1978, so it is 47 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 21,940 vehicles a day, projected to reach 21,940 by 2035. The structure is 46 ft (14 m) long and 98 ft wide.

Location

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CarriesDowlen RD
CrossesHillebrandt Bayou
Location1.5 MI SW of US 69
RouteCity Street 25
CountyJefferson County
StateTexas
Coordinates30.11296, -94.16862
Functional classUrban Minor 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
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
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
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
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length46 ft (14 m)
Longest span10 ft (3 m)
Deck width98 ft (30 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,940 (2015)
Projected traffic21,940 by 2035
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Dowlen RD over Hillebrandt Bayou built?

It was built in 1978, making it 47 years old in 2025.

What condition is Dowlen RD 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 Dowlen RD over Hillebrandt Bayou carry?

About 21,940 vehicles per day (2015 count).

How long is Dowlen RD over Hillebrandt Bayou?

The structure is 46 ft (14 m) long with a longest span of 10 ft (3 m) and a deck 98 ft wide.

Who owns Dowlen RD over Hillebrandt Bayou?

It is owned by the City or Municipal Highway Agency.