US Bridges

CR 345 over Unamed Branch

PoorPosted for load

Chickasaw County, Mississippi · Sec 3 T14S R 2E · Structure no. SA0900000000087

Built
2003
22 years old
Condition
Poor
inspected November 2022
Type
Channel Beam
Concrete
Length
57 ft
3 main spans
Daily traffic
74
2022 count
Owner
County
County Highway Agency

About this bridge

CR 345 over Unamed Branch is a concrete channel beam carrying CR 345 over Unamed Branch in Chickasaw County, Mississippi. It was built in 2003, so it is 22 years old, younger than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 74 vehicles a day, roughly 10% of them trucks, projected to reach 90 by 2040. The structure is 57 ft (17.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCR 345
CrossesUnamed Branch
LocationSec 3 T14S R 2E
RouteCounty Highway 45
CountyChickasaw County
StateMississippi
Coordinates33.89503, -89.06811
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating27.3 US tons
Inventory rating18.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (2022)
Projected traffic90 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$102,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 345 over Unamed Branch built?

It was built in 2003, making it 22 years old in 2025.

What condition is CR 345 over Unamed Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2022.

How much traffic does CR 345 over Unamed Branch carry?

About 74 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is CR 345 over Unamed Branch?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns CR 345 over Unamed Branch?

It is owned by the County Highway Agency.