US Bridges

Blackwater Road over Blackwater Creek

Good

Marshall County, Mississippi · Sec 10 T 6S R 4W · Structure no. SA4700000000150

Built
1960
65 years old, rebuilt 2007
Condition
Good
inspected March 2024
Type
Channel Beam
Concrete
Length
209 ft
11 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

Blackwater Road over Blackwater Creek is a concrete channel beam carrying Blackwater Road over Blackwater Creek in Marshall County, Mississippi. It was built in 1960 and reconstructed in 2007, so it is 65 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 50 vehicles a day, projected to reach 75 by 2042. The structure is 209 ft (63.7 m) long and 21 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesBlackwater Road
CrossesBlackwater Creek
LocationSec 10 T 6S R 4W
RouteCounty Highway 155
Coordinates34.56952, -89.61282
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 15
Structure length209 ft (63.7 m)
Longest span19 ft (5.8 m)
Deck width21 ft (6.4 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic75 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackwater Road over Blackwater Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2007.

What condition is Blackwater Road over Blackwater 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 Blackwater Road over Blackwater Creek carry?

About 50 vehicles per day (2022 count).

How long is Blackwater Road over Blackwater Creek?

The structure is 209 ft (63.7 m) long with a longest span of 19 ft (5.8 m) and a deck 21 ft wide.

Who owns Blackwater Road over Blackwater Creek?

It is owned by the County Highway Agency.