US Bridges

SR 30 over Big Brown Creek

Fair

Prentiss County, Mississippi · 3.8 MI E SR 4 · Structure no. 310003005907450

Built
1953
72 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
230 ft
1 main span
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

SR 30 over Big Brown Creek is a steel stringer/multi-beam or girder carrying SR 30 over Big Brown Creek in Prentiss County, Mississippi. It was built in 1953, so it is 72 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 3,400 vehicles a day, roughly 21% of them trucks, projected to reach 3,400 by 2043. The structure is 230 ft (70.1 m) long and 28 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

CarriesSR 30
CrossesBig Brown Creek
Location3.8 MI E SR 4
RouteState Highway 30
Coordinates34.62499, -88.44541
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadHS 15
Structure length230 ft (70.1 m)
Longest span80 ft (24.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic3,400 by 2043
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 30 over Big Brown Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is SR 30 over Big Brown Creek 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 SR 30 over Big Brown Creek carry?

About 3,400 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is SR 30 over Big Brown Creek?

The structure is 230 ft (70.1 m) long with a longest span of 80 ft (24.4 m) and a deck 28 ft wide.

Who owns SR 30 over Big Brown Creek?

It is owned by the State Highway Agency.