US Bridges

SR 407 over Big Black River

Fair

Montgomery County, Mississippi · 11.2 MI N Choctaw Cl · Structure no. 310040704902940

Built
1991
34 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
474 ft
1 main span
Daily traffic
480
2023 count
Owner
State
State Highway Agency

About this bridge

SR 407 over Big Black River is a prestressed concrete stringer/multi-beam or girder carrying SR 407 over Big Black River in Montgomery County, Mississippi. It was built in 1991, so it is 34 years old, younger 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 480 vehicles a day, roughly 6% of them trucks, projected to reach 480 by 2043. The structure is 474 ft (144.6 m) long and 33 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesSR 407
CrossesBig Black River
Location11.2 MI N Choctaw Cl
RouteState Highway 407
CountyMontgomery County
StateMississippi
Coordinates33.38253, -89.61355
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.5 US tons
Inventory rating42.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadHS 20
Structure length474 ft (144.6 m)
Longest span113 ft (34.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic480 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 407 over Big Black River built?

It was built in 1991, making it 34 years old in 2025.

What condition is SR 407 over Big Black River 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 August 2023.

How much traffic does SR 407 over Big Black River carry?

About 480 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 407 over Big Black River?

The structure is 474 ft (144.6 m) long with a longest span of 113 ft (34.4 m) and a deck 33 ft wide.

Who owns SR 407 over Big Black River?

It is owned by the State Highway Agency.