US Bridges

SR 570 over Unnamed Stream

Good

Amite County, Mississippi · 3.2 MI E SR 569 · Structure no. 310057000300880

Built
1982
43 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
850
2023 count
Owner
State
State Highway Agency

About this bridge

SR 570 over Unnamed Stream is a concrete culvert carrying SR 570 over Unnamed Stream in Amite County, Mississippi. It was built in 1982, so it is 43 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 850 vehicles a day, roughly 10% of them trucks, projected to reach 850 by 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 14.3 mi (23 km).

CarriesSR 570
CrossesUnnamed Stream
Location3.2 MI E SR 569
RouteState Highway 570
Coordinates31.2922, -90.60232
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating38.6 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2023)
Projected traffic850 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR 570 over Unnamed Stream built?

It was built in 1982, making it 43 years old in 2025.

What condition is SR 570 over Unnamed Stream 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 February 2024.

How much traffic does SR 570 over Unnamed Stream carry?

About 850 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SR 570 over Unnamed Stream?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m).

Who owns SR 570 over Unnamed Stream?

It is owned by the State Highway Agency.