US Bridges

SR 21 over S Canal Tuscolameta Crk

Fair

Scott County, Mississippi · 4.8 MI S SR 492 · Structure no. 310002106201320

Built
1981
44 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
122 ft
3 main spans
Daily traffic
3,900
2023 count
Owner
State
State Highway Agency

About this bridge

SR 21 over S Canal Tuscolameta Crk is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 21 over S Canal Tuscolameta Crk in Scott County, Mississippi. It was built in 1981, so it is 44 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 3,900 vehicles a day, roughly 14% of them trucks, projected to reach 4,500 by 2043. The structure is 122 ft (37.2 m) long and 43 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesSR 21
CrossesS Canal Tuscolameta Crk
Location4.8 MI S SR 492
RouteState Highway 21
CountyScott County
StateMississippi
Coordinates32.52394, -89.38621
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2023)
Projected traffic4,500 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR 21 over S Canal Tuscolameta Crk built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR 21 over S Canal Tuscolameta Crk 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 December 2024.

How much traffic does SR 21 over S Canal Tuscolameta Crk carry?

About 3,900 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 21 over S Canal Tuscolameta Crk?

The structure is 122 ft (37.2 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns SR 21 over S Canal Tuscolameta Crk?

It is owned by the State Highway Agency.