US Bridges

SR 18 over Robinson RD Lynch ST

Fair

Hinds County, Mississippi · 0.4 MI E I 20 · Structure no. 31000180250561A

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
551 ft
9 main spans
Daily traffic
6,000
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Robinson RD Lynch ST is a prestressed concrete stringer/multi-beam or girder carrying SR 18 over Robinson RD Lynch ST in Hinds County, Mississippi. It was built in 1967, so it is 58 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 6,000 vehicles a day, roughly 3% of them trucks, projected to reach 6,000 by 2043. The structure is 551 ft (167.9 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 18
CrossesRobinson RD Lynch ST
Location0.4 MI E I 20
RouteState Highway 18
CountyHinds County
StateMississippi
Coordinates32.29842, -90.26063
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.7 US tons
Inventory rating34.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length551 ft (167.9 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic6,000 by 2043
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$523 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 18 over Robinson RD Lynch ST built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 18 over Robinson RD Lynch ST 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 May 2024.

How much traffic does SR 18 over Robinson RD Lynch ST carry?

About 6,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 18 over Robinson RD Lynch ST?

The structure is 551 ft (167.9 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns SR 18 over Robinson RD Lynch ST?

It is owned by the State Highway Agency.