US Bridges

Mariah RD over Cow Creek

Fair

Jackson Parish, Louisiana · 1.4 MI NE of LA 4 · Structure no. 052532148922011

Built
1983
42 years old
Condition
Fair
inspected February 2024
Type
Culvert
Steel
Length
33 ft
3 main spans
Daily traffic
22
2020 count
Owner
County
County Highway Agency

About this bridge

Mariah RD over Cow Creek is a steel culvert carrying Mariah RD over Cow Creek in Jackson Parish, Louisiana. It was built in 1983, so it is 42 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 22 vehicles a day, projected to reach 24 by 2040. The structure is 33 ft (10.1 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMariah RD
CrossesCow Creek
Location1.4 MI NE of LA 4
RouteCounty Highway 0
CountyJackson Parish
StateLouisiana
Coordinates32.26329, -92.37997
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 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 traffic22 (2020)
Projected traffic24 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Mariah RD over Cow Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Mariah RD over Cow Creek 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 February 2024.

How much traffic does Mariah RD over Cow Creek carry?

About 22 vehicles per day (2020 count).

How long is Mariah RD over Cow Creek?

The structure is 33 ft (10.1 m) long with a longest span of 9 ft (2.7 m) and a deck 40 ft wide.

Who owns Mariah RD over Cow Creek?

It is owned by the County Highway Agency.