US Bridges

Co. Road 3221 over Zilpha Creek

Good

Attala County, Mississippi · Sec 9 T16N R 7E B · Structure no. SA040000000A144

Built
2020
5 years old
Condition
Good
inspected December 2023
Type
Culvert
Steel
Length
36 ft
3 main spans
Daily traffic
60
2023 count
Owner
County
County Highway Agency

About this bridge

Co. Road 3221 over Zilpha Creek is a steel culvert carrying Co. Road 3221 over Zilpha Creek in Attala County, Mississippi. It was built in 2020, so it is 5 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 60 vehicles a day, roughly 8% of them trucks, projected to reach 90 by 2038. The structure is 36 ft (11 m) long and 41 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCo. Road 3221
CrossesZilpha Creek
LocationSec 9 T16N R 7E B
RouteCounty Highway 11
Coordinates33.26237, -89.58294
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating93.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckSteel plate
Main spans3
Design loadH 15
Structure length36 ft (11 m)
Longest span9 ft (2.7 m)
Deck width41 ft (12.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic90 by 2038
Trucks8%
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$117,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Co. Road 3221 over Zilpha Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is Co. Road 3221 over Zilpha 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 December 2023.

How much traffic does Co. Road 3221 over Zilpha Creek carry?

About 60 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Co. Road 3221 over Zilpha Creek?

The structure is 36 ft (11 m) long with a longest span of 9 ft (2.7 m) and a deck 41 ft wide.

Who owns Co. Road 3221 over Zilpha Creek?

It is owned by the County Highway Agency.