US Bridges

SR 42 over Middle Prong Silver CR

Good

Jefferson Davis County, Mississippi · 0.3 MI E Lawrence Cl · Structure no. 310004203300440

Built
1970
55 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
7 main spans
Daily traffic
1,200
2023 count
Owner
State
State Highway Agency

About this bridge

SR 42 over Middle Prong Silver CR is a prestressed concrete stringer/multi-beam or girder carrying SR 42 over Middle Prong Silver CR in Jefferson Davis County, Mississippi. It was built in 1970, so it is 55 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 1,200 vehicles a day, roughly 11% of them trucks, projected to reach 1,200 by 2043. The structure is 280 ft (85.3 m) long and 35 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesSR 42
CrossesMiddle Prong Silver CR
Location0.3 MI E Lawrence Cl
RouteState Highway 42
Coordinates31.73034, -89.96853
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.1 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span40 ft (12.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2023)
Projected traffic1,200 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 42 over Middle Prong Silver CR built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 42 over Middle Prong Silver CR 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 October 2023.

How much traffic does SR 42 over Middle Prong Silver CR carry?

About 1,200 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 42 over Middle Prong Silver CR?

The structure is 280 ft (85.3 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns SR 42 over Middle Prong Silver CR?

It is owned by the State Highway Agency.