US Bridges

Keystone RD over Stux Bayou

Fair

Ouachita Parish, Louisiana · 1.6 MI W of US 165 N · Structure no. 053732394920481

Built
1993
32 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
93 ft
5 main spans
Daily traffic
245
1979 count
Owner
County
County Highway Agency

About this bridge

Keystone RD over Stux Bayou is a concrete slab carrying Keystone RD over Stux Bayou in Ouachita Parish, Louisiana. It was built in 1993, so it is 32 years old, younger than the Louisiana average of 43 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 245 vehicles a day, projected to reach 269 by 1999. The structure is 93 ft (28.3 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesKeystone RD
CrossesStux Bayou
Location1.6 MI W of US 165 N
RouteCounty Highway 0
CountyOuachita Parish
StateLouisiana
Coordinates32.65944, -92.08031
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic245 (1979)
Projected traffic269 by 1999
Trucks—
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Keystone RD over Stux Bayou built?

It was built in 1993, making it 32 years old in 2025.

What condition is Keystone RD over Stux 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 March 2024.

How much traffic does Keystone RD over Stux Bayou carry?

About 245 vehicles per day (1979 count).

How long is Keystone RD over Stux Bayou?

The structure is 93 ft (28.3 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Keystone RD over Stux Bayou?

It is owned by the County Highway Agency.