US Bridges

Rocky Mount Road over Lil Cypress Bayou

Fair

Bossier Parish, Louisiana · 3.1 Mi. SE of LA 3 · Structure no. 040832499934051

Built
1994
31 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
62 ft
4 main spans
Daily traffic
50
2020 count
Owner
County
County Highway Agency

About this bridge

Rocky Mount Road over Lil Cypress Bayou is a wood or timber stringer/multi-beam or girder carrying Rocky Mount Road over Lil Cypress Bayou in Bossier Parish, Louisiana. It was built in 1994, so it is 31 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 5 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 50 vehicles a day, projected to reach 55 by 2040. The structure is 62 ft (18.9 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRocky Mount Road
CrossesLil Cypress Bayou
Location3.1 Mi. SE of LA 3
RouteCounty Highway 0
CountyBossier Parish
StateLouisiana
Coordinates32.82965, -93.67588
Functional classRural 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length62 ft (18.9 m)
Longest span15 ft (4.6 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic55 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Rocky Mount Road over Lil Cypress Bayou built?

It was built in 1994, making it 31 years old in 2025.

What condition is Rocky Mount Road over Lil Cypress 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 December 2024.

How much traffic does Rocky Mount Road over Lil Cypress Bayou carry?

About 50 vehicles per day (2020 count).

How long is Rocky Mount Road over Lil Cypress Bayou?

The structure is 62 ft (18.9 m) long with a longest span of 15 ft (4.6 m) and a deck 25 ft wide.

Who owns Rocky Mount Road over Lil Cypress Bayou?

It is owned by the County Highway Agency.