US Bridges

CR 308 over Unnamed Creek

Good

Calhoun County, Mississippi · Sec 21 T23N R 8E B · Structure no. SA0700000000121

Built
1988
37 years old
Condition
Good
inspected March 2024
Type
Channel Beam
Concrete
Length
69 ft
3 main spans
Daily traffic
500
2014 count
Owner
County
County Highway Agency

About this bridge

CR 308 over Unnamed Creek is a concrete channel beam carrying CR 308 over Unnamed Creek in Calhoun County, Mississippi. It was built in 1988, so it is 37 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 500 vehicles a day, roughly 8% of them trucks, projected to reach 750 by 2034. The structure is 69 ft (21 m) long and 31 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesCR 308
CrossesUnnamed Creek
LocationSec 21 T23N R 8E B
RouteCounty Highway 820
Coordinates33.83831, -89.46658
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
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 rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length69 ft (21 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2014)
Projected traffic750 by 2034
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 308 over Unnamed Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is CR 308 over Unnamed Creek 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 March 2024.

How much traffic does CR 308 over Unnamed Creek carry?

About 500 vehicles per day (2014 count), of which roughly 8% are trucks.

How long is CR 308 over Unnamed Creek?

The structure is 69 ft (21 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns CR 308 over Unnamed Creek?

It is owned by the County Highway Agency.