US Bridges

Blackwater 493 RD over Blackwater West Creek

Fair

Kemper County, Mississippi · Sec 24 T 9N R15E B · Structure no. SA3500000000014

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Channel Beam
Concrete
Length
57 ft
3 main spans
Daily traffic
300
2021 count
Owner
County
County Highway Agency

About this bridge

Blackwater 493 RD over Blackwater West Creek is a concrete channel beam carrying Blackwater 493 RD over Blackwater West Creek in Kemper County, Mississippi. It was built in 1975, so it is 50 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 300 vehicles a day, roughly 8% of them trucks, projected to reach 180 by 2043. The structure is 57 ft (17.4 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBlackwater 493 RD
CrossesBlackwater West Creek
LocationSec 24 T 9N R15E B
RouteCounty Highway 149
CountyKemper County
StateMississippi
Coordinates32.61939, -88.71936
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.8 US tons
Inventory rating38.9 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 width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2021)
Projected traffic180 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$600,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackwater 493 RD over Blackwater West Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Blackwater 493 RD over Blackwater West Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Blackwater 493 RD over Blackwater West Creek carry?

About 300 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Blackwater 493 RD over Blackwater West Creek?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 29 ft wide.

Who owns Blackwater 493 RD over Blackwater West Creek?

It is owned by the County Highway Agency.