US Bridges

SR 9 over Topishaw Canal

FairPosted for load

Calhoun County, Mississippi · 0.4 MI E SR 8 West · Structure no. 310000900703850

Built
1952
73 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
200 ft
1 main span
Daily traffic
3,100
2023 count
Owner
State
State Highway Agency

About this bridge

SR 9 over Topishaw Canal is a steel stringer/multi-beam or girder carrying SR 9 over Topishaw Canal in Calhoun County, Mississippi. It was built in 1952, so it is 73 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 3,100 vehicles a day, roughly 16% of them trucks, projected to reach 3,100 by 2043. The structure is 200 ft (61 m) long and 26 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

Location

Open in Google Maps
CarriesSR 9
CrossesTopishaw Canal
Location0.4 MI E SR 8 West
RouteState Highway 9
CountyCalhoun County
StateMississippi
Coordinates33.81439, -89.34597
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.8 US tons
Inventory rating24.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length200 ft (61 m)
Longest span80 ft (24.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2023)
Projected traffic3,100 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 9 over Topishaw Canal built?

It was built in 1952, making it 73 years old in 2025.

What condition is SR 9 over Topishaw Canal 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 February 2024.

How much traffic does SR 9 over Topishaw Canal carry?

About 3,100 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SR 9 over Topishaw Canal?

The structure is 200 ft (61 m) long with a longest span of 80 ft (24.4 m) and a deck 26 ft wide.

Who owns SR 9 over Topishaw Canal?

It is owned by the State Highway Agency.