US Bridges

SR 413 over Big Black Relief

Good

Montgomery County, Mississippi · 2.4 MI S US 82 · Structure no. 310041304902180

Built
1965
60 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
9 main spans
Daily traffic
580
2023 count
Owner
State
State Highway Agency

About this bridge

SR 413 over Big Black Relief is a prestressed concrete stringer/multi-beam or girder carrying SR 413 over Big Black Relief in Montgomery County, Mississippi. It was built in 1965, so it is 60 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 580 vehicles a day, roughly 11% of them trucks, projected to reach 580 by 2043. The structure is 360 ft (109.7 m) long and 28 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSR 413
CrossesBig Black Relief
Location2.4 MI S US 82
RouteState Highway 413
Coordinates33.41831, -89.55263
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 15
Structure length360 ft (109.7 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2023)
Projected traffic580 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed29.8 mi (48 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$250 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 413 over Big Black Relief built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR 413 over Big Black Relief 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 September 2023.

How much traffic does SR 413 over Big Black Relief carry?

About 580 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 413 over Big Black Relief?

The structure is 360 ft (109.7 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns SR 413 over Big Black Relief?

It is owned by the State Highway Agency.