US Bridges

Mill Road over Slough

Fair

Lowndes County, Mississippi · Sec 8 T18S R17W B · Structure no. SA4400000000081

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
1,400
2022 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Slough is a concrete slab carrying Mill Road over Slough in Lowndes 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 1,400 vehicles a day, roughly 8% of them trucks, projected to reach 2,100 by 2044. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesMill Road
CrossesSlough
LocationSec 8 T18S R17W B
RouteCounty Highway 763
Coordinates33.50958, -88.33726
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2022)
Projected traffic2,100 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$375,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Slough built?

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

What condition is Mill Road 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 2024.

How much traffic does Mill Road over Slough carry?

About 1,400 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mill Road over Slough?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Mill Road over Slough?

It is owned by the County Highway Agency.