US Bridges

Seminary-Wburg RD over Big Swamp Creek

Fair

Covington County, Mississippi · Sec 1 T 7N R16W B · Structure no. SA1600000000033

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Channel Beam
Concrete
Length
76 ft
4 main spans
Daily traffic
400
2018 count
Owner
County
County Highway Agency

About this bridge

Seminary-Wburg RD over Big Swamp Creek is a concrete channel beam carrying Seminary-Wburg RD over Big Swamp Creek in Covington County, Mississippi. It was built in 1970, so it is 55 years old, older than the Mississippi average of 38.9 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 400 vehicles a day, roughly 8% of them trucks, projected to reach 600 by 2045. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSeminary-Wburg RD
CrossesBig Swamp Creek
LocationSec 1 T 7N R16W B
RouteCounty Highway 913
Coordinates31.59694, -89.56889
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2018)
Projected traffic600 by 2045
Trucks8%
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

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$230,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Seminary-Wburg RD over Big Swamp Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Seminary-Wburg RD over Big Swamp 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 October 2024.

How much traffic does Seminary-Wburg RD over Big Swamp Creek carry?

About 400 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is Seminary-Wburg RD over Big Swamp Creek?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Seminary-Wburg RD over Big Swamp Creek?

It is owned by the County Highway Agency.