US Bridges

Old HWY 49 over Flat Branch

Fair

Harrison County, Mississippi · Sec 32 T 6S R11W · Structure no. SA2400000000059

Built
2001
24 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
120 ft
3 main spans
Daily traffic
3,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old HWY 49 over Flat Branch is a concrete slab carrying Old HWY 49 over Flat Branch in Harrison County, Mississippi. It was built in 2001, so it is 24 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 3,000 vehicles a day, roughly 8% of them trucks, projected to reach 4,500 by 2042. The structure is 120 ft (36.6 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld HWY 49
CrossesFlat Branch
LocationSec 32 T 6S R11W
RouteCounty Highway 649
CountyHarrison County
StateMississippi
Coordinates30.47667, -89.10722
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.7 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width39 ft (12 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2010)
Projected traffic4,500 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Old HWY 49 over Flat Branch built?

It was built in 2001, making it 24 years old in 2025.

What condition is Old HWY 49 over Flat Branch 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 January 2025.

How much traffic does Old HWY 49 over Flat Branch carry?

About 3,000 vehicles per day (2010 count), of which roughly 8% are trucks.

How long is Old HWY 49 over Flat Branch?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 39 ft wide.

Who owns Old HWY 49 over Flat Branch?

It is owned by the City or Municipal Highway Agency.