US Bridges

Lowwater Bridge RD over Bayou Macon River

Good

Franklin Parish, Louisiana · Franklin Ph RD No 399 · Structure no. 582132101913451

Built
1988
37 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
300 ft
6 main spans
Daily traffic
40
1986 count
Owner
County
County Highway Agency

About this bridge

Lowwater Bridge RD over Bayou Macon River is a prestressed concrete continuous stringer/multi-beam or girder carrying Lowwater Bridge RD over Bayou Macon River in Franklin 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 44 by 2006. The structure is 300 ft (91.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLowwater Bridge RD
CrossesBayou Macon River
LocationFranklin Ph RD No 399
RouteCounty Highway 0
Coordinates32.16833, -91.575
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (1986)
Projected traffic44 by 2006
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Lowwater Bridge RD over Bayou Macon River built?

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

What condition is Lowwater Bridge RD over Bayou Macon River 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 May 2024.

How much traffic does Lowwater Bridge RD over Bayou Macon River carry?

About 40 vehicles per day (1986 count).

How long is Lowwater Bridge RD over Bayou Macon River?

The structure is 300 ft (91.4 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns Lowwater Bridge RD over Bayou Macon River?

It is owned by the County Highway Agency.