US Bridges

Wallace RD over Stillhouse Bayou Trib

Poor

Bossier Parish, Louisiana · 0.4 M South of LA 537 · Structure no. 040832575934431

Built
1991
34 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
40
2020 count
Owner
County
County Highway Agency

About this bridge

Wallace RD over Stillhouse Bayou Trib is a wood or timber stringer/multi-beam or girder carrying Wallace RD over Stillhouse Bayou Trib in Bossier Parish, Louisiana. It was built in 1991, so it is 34 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 40 vehicles a day, projected to reach 44 by 2040. The structure is 31 ft (9.4 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesWallace RD
CrossesStillhouse Bayou Trib
Location0.4 M South of LA 537
RouteCounty Highway 0
CountyBossier Parish
StateLouisiana
Coordinates32.95869, -93.73925
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length31 ft (9.4 m)
Longest span15 ft (4.6 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic44 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Wallace RD over Stillhouse Bayou Trib built?

It was built in 1991, making it 34 years old in 2025.

What condition is Wallace RD over Stillhouse Bayou Trib in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Wallace RD over Stillhouse Bayou Trib carry?

About 40 vehicles per day (2020 count).

How long is Wallace RD over Stillhouse Bayou Trib?

The structure is 31 ft (9.4 m) long with a longest span of 15 ft (4.6 m) and a deck 27 ft wide.

Who owns Wallace RD over Stillhouse Bayou Trib?

It is owned by the County Highway Agency.