US Bridges

Carter RD over Carter RD 177 Prairie B

FairPosted for load

Webster Parish, Louisiana · 1.4 MI E of HWY 163 · Structure no. 046032272932471

Built
1979
46 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
96 ft
5 main spans
Daily traffic
207
2020 count
Owner
County
County Highway Agency

About this bridge

Carter RD over Carter RD 177 Prairie B is a wood or timber stringer/multi-beam or girder carrying Carter RD over Carter RD 177 Prairie B in Webster Parish, Louisiana. It was built in 1979, so it is 46 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 207 vehicles a day, projected to reach 227 by 2040. The structure is 96 ft (29.3 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCarter RD
CrossesCarter RD 177 Prairie B
Location1.4 MI E of HWY 163
RouteCounty Highway 0
CountyWebster Parish
StateLouisiana
Coordinates32.45382, -93.41116
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 20
Structure length96 ft (29.3 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic207 (2020)
Projected traffic227 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$334,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Carter RD over Carter RD 177 Prairie B built?

It was built in 1979, making it 46 years old in 2025.

What condition is Carter RD over Carter RD 177 Prairie B 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 July 2023.

How much traffic does Carter RD over Carter RD 177 Prairie B carry?

About 207 vehicles per day (2020 count).

How long is Carter RD over Carter RD 177 Prairie B?

The structure is 96 ft (29.3 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Carter RD over Carter RD 177 Prairie B?

It is owned by the County Highway Agency.