US Bridges

Timberstone DR over Henderson Bayou

Good

Ascension Parish, Louisiana · .7 Mi. S. of LA 933 · Structure no. 610300000610258

Built
2009
16 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
82 ft
1 main span
Daily traffic
120
2019 count
Owner
County
County Highway Agency

About this bridge

Timberstone DR over Henderson Bayou is a concrete culvert carrying Timberstone DR over Henderson Bayou in Ascension Parish, Louisiana. It was built in 2009, so it is 16 years old, younger than the Louisiana average of 43 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 120 vehicles a day, projected to reach 132 by 2039. The structure is 82 ft (25 m) long and 37 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesTimberstone DR
CrossesHenderson Bayou
Location.7 Mi. S. of LA 933
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.3037, -90.89251
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating65 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length82 ft (25 m)
Longest span82 ft (25 m)
Deck width37 ft (11.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2019)
Projected traffic132 by 2039
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Timberstone DR over Henderson Bayou built?

It was built in 2009, making it 16 years old in 2025.

What condition is Timberstone DR over Henderson Bayou 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 January 2023.

How much traffic does Timberstone DR over Henderson Bayou carry?

About 120 vehicles per day (2019 count).

How long is Timberstone DR over Henderson Bayou?

The structure is 82 ft (25 m) long with a longest span of 82 ft (25 m) and a deck 37 ft wide.

Who owns Timberstone DR over Henderson Bayou?

It is owned by the County Highway Agency.