US Bridges

SR 13 over Cnic RR

GoodPosted for load

Simpson County, Mississippi · 6.0 MI N SR 28 · Structure no. 310001306409900

Built
1941
84 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
280 ft
7 main spans
Daily traffic
4,800
2023 count
Owner
State
State Highway Agency

About this bridge

SR 13 over Cnic RR is a steel stringer/multi-beam or girder carrying SR 13 over Cnic RR in Simpson County, Mississippi. It was built in 1941, so it is 84 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. Its operating status is: posted for load restriction.

It carries about 4,800 vehicles a day, roughly 14% of them trucks, projected to reach 4,800 by 2043. The structure is 280 ft (85.3 m) long and 25 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesSR 13
CrossesCnic RR
Location6.0 MI N SR 28
RouteState Highway 13
CountySimpson County
StateMississippi
Coordinates31.96524, -89.88566
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating42 US tons
Inventory rating25.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length280 ft (85.3 m)
Longest span40 ft (12.2 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2023)
Projected traffic4,800 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed21.1 mi (34 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
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 13 over Cnic RR built?

It was built in 1941, making it 84 years old in 2025.

What condition is SR 13 over Cnic RR 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 May 2023.

How much traffic does SR 13 over Cnic RR carry?

About 4,800 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 13 over Cnic RR?

The structure is 280 ft (85.3 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.

Who owns SR 13 over Cnic RR?

It is owned by the State Highway Agency.