US Bridges

LA1222 over Mallard Bayou Relief

Good

Natchitoches Parish, Louisiana · 2.07 Mi. East of LA 485 · Structure no. 083508350402071

Built
1994
31 years old
Condition
Good
inspected February 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
94
2021 count
Owner
State
State Highway Agency

About this bridge

LA1222 over Mallard Bayou Relief is a steel culvert carrying LA1222 over Mallard Bayou Relief in Natchitoches 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 94 vehicles a day, roughly 10% of them trucks, projected to reach 103 by 2041. The structure is 22 ft (6.7 m) long and 72 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLA1222
CrossesMallard Bayou Relief
Location2.07 Mi. East of LA 485
RouteState Highway 1222
Coordinates31.74625, -93.2704
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.8 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width72 ft (21.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94 (2021)
Projected traffic103 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 LA1222 over Mallard Bayou Relief built?

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

What condition is LA1222 over Mallard Bayou Relief in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does LA1222 over Mallard Bayou Relief carry?

About 94 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA1222 over Mallard Bayou Relief?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m) and a deck 72 ft wide.

Who owns LA1222 over Mallard Bayou Relief?

It is owned by the State Highway Agency.