US Bridges

SR 18 over Moore Spring

Good

Hinds County, Mississippi · 9.2 MI E SR 27 · Structure no. 310001802503920

Built
1938
87 years old, rebuilt 1970
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
4,500
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Moore Spring is a concrete culvert carrying SR 18 over Moore Spring in Hinds County, Mississippi. It was built in 1938 and reconstructed in 1970, so it is 87 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,500 vehicles a day, roughly 14% of them trucks, projected to reach 4,500 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 41 mi (66 km).

CarriesSR 18
CrossesMoore Spring
Location9.2 MI E SR 27
RouteState Highway 18
Coordinates32.20105, -90.47606
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2023)
Projected traffic4,500 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed41 mi (66 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$303 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 18 over Moore Spring built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1970.

What condition is SR 18 over Moore Spring 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 2024.

How much traffic does SR 18 over Moore Spring carry?

About 4,500 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 18 over Moore Spring?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns SR 18 over Moore Spring?

It is owned by the State Highway Agency.