US Bridges

Nona ST over Castor Bayou Trib.

Fair

Vernon Parish, Louisiana · 0.58 Miles West of US 171 · Structure no. 085831091931651

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
23 ft
3 main spans
Daily traffic
2,000
1980 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nona ST over Castor Bayou Trib. is a concrete culvert carrying Nona ST over Castor Bayou Trib. in Vernon Parish, Louisiana. It was built in 1977, so it is 48 years old, older 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 2,000 vehicles a day, projected to reach 2,200 by 2000. The structure is 23 ft (7 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNona ST
CrossesCastor Bayou Trib.
Location0.58 Miles West of US 171
RouteCounty Highway 0
CountyVernon Parish
StateLouisiana
Coordinates31.1508, -93.2753
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 alignment7: Better than present minimum criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length23 ft (7 m)
Longest span8 ft (2.4 m)
Deck width58 ft (17.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (1980)
Projected traffic2,200 by 2000
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Nona ST over Castor Bayou Trib. built?

It was built in 1977, making it 48 years old in 2025.

What condition is Nona ST over Castor Bayou 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 August 2023.

How much traffic does Nona ST over Castor Bayou Trib. carry?

About 2,000 vehicles per day (1980 count).

How long is Nona ST over Castor Bayou Trib.?

The structure is 23 ft (7 m) long with a longest span of 8 ft (2.4 m) and a deck 58 ft wide.

Who owns Nona ST over Castor Bayou Trib.?

It is owned by the City or Municipal Highway Agency.