US Bridges

Mcconathy RD over Vernon Lake Trib.

Fair

Vernon Parish, Louisiana · 0.54 M. S. of JCT LA 111 · Structure no. 085831138932331

Built
1988
37 years old
Condition
Fair
inspected March 2023
Type
Culvert
Steel
Length
23 ft
2 main spans
Daily traffic
230
1976 count
Owner
County
County Highway Agency

About this bridge

Mcconathy RD over Vernon Lake Trib. is a steel culvert carrying Mcconathy RD over Vernon Lake Trib. in Vernon Parish, Louisiana. It was built in 1988, so it is 37 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 230 vehicles a day, projected to reach 253 by 1996. The structure is 23 ft (7 m) long and 40 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesMcconathy RD
CrossesVernon Lake Trib.
Location0.54 M. S. of JCT LA 111
RouteCounty Highway 0
CountyVernon Parish
StateLouisiana
Coordinates31.22998, -93.3886
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span9 ft (2.7 m)
Deck width40 ft (12.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (1976)
Projected traffic253 by 1996
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 Mcconathy RD over Vernon Lake Trib. built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mcconathy RD over Vernon Lake Trib. 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 2023.

How much traffic does Mcconathy RD over Vernon Lake Trib. carry?

About 230 vehicles per day (1976 count).

How long is Mcconathy RD over Vernon Lake Trib.?

The structure is 23 ft (7 m) long with a longest span of 9 ft (2.7 m) and a deck 40 ft wide.

Who owns Mcconathy RD over Vernon Lake Trib.?

It is owned by the County Highway Agency.