US Bridges

Ferguson RD over Ash Slough

Fair

Richland Parish, Louisiana · Logmi 8.97 FR 1DE to · Structure no. 054232251913281

Built
1984
41 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
26 ft
3 main spans
Daily traffic
100
1974 count
Owner
County
County Highway Agency

About this bridge

Ferguson RD over Ash Slough is a steel culvert carrying Ferguson RD over Ash Slough in Richland Parish, Louisiana. It was built in 1984, so it is 41 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 100 vehicles a day, projected to reach 110 by 1994. The structure is 26 ft (7.9 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFerguson RD
CrossesAsh Slough
LocationLogmi 8.97 FR 1DE to
RouteCounty Highway 0
CountyRichland Parish
StateLouisiana
Coordinates32.42039, -91.54831
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 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 rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1974)
Projected traffic110 by 1994
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Ferguson RD over Ash Slough built?

It was built in 1984, making it 41 years old in 2025.

What condition is Ferguson RD over Ash Slough 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 June 2023.

How much traffic does Ferguson RD over Ash Slough carry?

About 100 vehicles per day (1974 count).

How long is Ferguson RD over Ash Slough?

The structure is 26 ft (7.9 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns Ferguson RD over Ash Slough?

It is owned by the County Highway Agency.