US Bridges

US 412-08- Lm 4.50 over Grassy Slough

Fair

Greene County, Arkansas · 4.50 MI E of Cache River · Structure no. 000000000001914

Built
1935
90 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
61 ft
2 main spans
Daily traffic
4,500
2018 count
Owner
County
County Highway Agency

About this bridge

US 412-08- Lm 4.50 over Grassy Slough is a concrete tee beam carrying US 412-08- Lm 4.50 over Grassy Slough in Greene County, Arkansas. It was built in 1935, so it is 90 years old, older than the Arkansas average of 45.1 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 4,500 vehicles a day, roughly 22% of them trucks, projected to reach 4,600 by 2033. The structure is 61 ft (18.7 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS 412-08- Lm 4.50
CrossesGrassy Slough
Location4.50 MI E of Cache River
RouteU.S. Route 412
CountyGreene County
StateArkansas
Coordinates36.06936, -90.74308
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length61 ft (18.7 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2018)
Projected traffic4,600 by 2033
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$360,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 412-08- Lm 4.50 over Grassy Slough built?

It was built in 1935, making it 90 years old in 2025.

What condition is US 412-08- Lm 4.50 over Grassy Slough 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 August 2023.

How much traffic does US 412-08- Lm 4.50 over Grassy Slough carry?

About 4,500 vehicles per day (2018 count), of which roughly 22% are trucks.

How long is US 412-08- Lm 4.50 over Grassy Slough?

The structure is 61 ft (18.7 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns US 412-08- Lm 4.50 over Grassy Slough?

It is owned by the County Highway Agency.