US Bridges

Morton-Marathon RD over Relief for Strong River

Good

Scott County, Mississippi · Sec 13 T 5N R 6E B · Structure no. SA6200000000005

Built
2001
24 years old
Condition
Good
inspected October 2024
Type
Channel Beam
Concrete
Length
62 ft
2 main spans
Daily traffic
670
2023 count
Owner
County
County Highway Agency

About this bridge

Morton-Marathon RD over Relief for Strong River is a concrete channel beam carrying Morton-Marathon RD over Relief for Strong River in Scott County, Mississippi. It was built in 2001, so it is 24 years old, younger 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 670 vehicles a day, roughly 8% of them trucks, projected to reach 885 by 2045. The structure is 62 ft (18.9 m) long and 25 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesMorton-Marathon RD
CrossesRelief for Strong River
LocationSec 13 T 5N R 6E B
RouteCounty Highway 484
Coordinates32.27806, -89.62899
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length62 ft (18.9 m)
Longest span31 ft (9.4 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2023)
Projected traffic885 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$370,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Morton-Marathon RD over Relief for Strong River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Morton-Marathon RD over Relief for Strong River 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 October 2024.

How much traffic does Morton-Marathon RD over Relief for Strong River carry?

About 670 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Morton-Marathon RD over Relief for Strong River?

The structure is 62 ft (18.9 m) long with a longest span of 31 ft (9.4 m) and a deck 25 ft wide.

Who owns Morton-Marathon RD over Relief for Strong River?

It is owned by the County Highway Agency.