US Bridges

SR 18 over Drains Borrow Pit

Good

Smith County, Mississippi · 5.4 MI E SR 35 · Structure no. 310001806511430

Built
1972
53 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
3,300
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Drains Borrow Pit is a concrete culvert carrying SR 18 over Drains Borrow Pit in Smith County, Mississippi. It was built in 1972, so it is 53 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.

It carries about 3,300 vehicles a day, roughly 22% of them trucks, projected to reach 3,300 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 36 mi (58 km).

CarriesSR 18
CrossesDrains Borrow Pit
Location5.4 MI E SR 35
RouteState Highway 18
Coordinates32.01361, -89.43933
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.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.9 US tons
Inventory rating50.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2023)
Projected traffic3,300 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 18 over Drains Borrow Pit built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR 18 over Drains Borrow Pit 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 September 2023.

How much traffic does SR 18 over Drains Borrow Pit carry?

About 3,300 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is SR 18 over Drains Borrow Pit?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m).

Who owns SR 18 over Drains Borrow Pit?

It is owned by the State Highway Agency.