US Bridges

FAS 626 Riverside over Slough

FairPosted for load

Washington County, Mississippi · Sec 18 T15N R 8W B · Structure no. SA7600000000084

Built
1962
63 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
38 ft
2 main spans
Daily traffic
310
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 626 Riverside over Slough is a concrete slab carrying FAS 626 Riverside over Slough in Washington County, Mississippi. It was built in 1962, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 310 vehicles a day, roughly 8% of them trucks, projected to reach 400 by 2041. The structure is 38 ft (11.6 m) long and 25 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesFAS 626 Riverside
CrossesSlough
LocationSec 18 T15N R 8W B
RouteCounty Highway 626
Coordinates33.14725, -91.06451
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.8 US tons
Inventory rating16.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2021)
Projected traffic400 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$800,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 626 Riverside over Slough built?

It was built in 1962, making it 63 years old in 2025.

What condition is FAS 626 Riverside over Slough 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 March 2023.

How much traffic does FAS 626 Riverside over Slough carry?

About 310 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is FAS 626 Riverside over Slough?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns FAS 626 Riverside over Slough?

It is owned by the County Highway Agency.