US Bridges

SR 309 over Coldwater River

Good

Marshall County, Mississippi · 4.9 MI N SR 178 · Structure no. 310030904702190

Built
2015
10 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,937 ft
1 main span
Daily traffic
3,800
2023 count
Owner
State
State Highway Agency

About this bridge

SR 309 over Coldwater River is a prestressed concrete stringer/multi-beam or girder carrying SR 309 over Coldwater River in Marshall County, Mississippi. It was built in 2015, so it is 10 years old, younger 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 3,800 vehicles a day, roughly 11% of them trucks, projected to reach 3,800 by 2043. The structure is 1,937 ft (590.3 m) long and 47 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesSR 309
CrossesColdwater River
Location4.9 MI N SR 178
RouteState Highway 309
Coordinates34.93978, -89.68852
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+45 approach)
Design loadHL 93
Structure length1,937 ft (590.3 m)
Longest span135 ft (41.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2023)
Projected traffic3,800 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 309 over Coldwater River built?

It was built in 2015, making it 10 years old in 2025.

What condition is SR 309 over Coldwater River 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 January 2024.

How much traffic does SR 309 over Coldwater River carry?

About 3,800 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 309 over Coldwater River?

The structure is 1,937 ft (590.3 m) long with a longest span of 135 ft (41.1 m) and a deck 47 ft wide.

Who owns SR 309 over Coldwater River?

It is owned by the State Highway Agency.