US Bridges

US-70/SEC-17/L3.49 over Big Robe Bayou

Fair

Monroe County, Arkansas · 3.49 MI E Prairie CO Line · Structure no. 000000000001107

Built
1930
95 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
715 ft
21 main spans
Daily traffic
980
2019 count
Owner
State
State Highway Agency

About this bridge

US-70/SEC-17/L3.49 over Big Robe Bayou is a concrete tee beam carrying US-70/SEC-17/L3.49 over Big Robe Bayou in Monroe County, Arkansas. It was built in 1930, so it is 95 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 980 vehicles a day, roughly 7% of them trucks, projected to reach 1,167 by 2028. The structure is 715 ft (217.9 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS-70/SEC-17/L3.49
CrossesBig Robe Bayou
Location3.49 MI E Prairie CO Line
RouteU.S. Route 70
CountyMonroe County
StateArkansas
Coordinates34.83822, -91.31651
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans21
Design loadH 15
Structure length715 ft (217.9 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic980 (2019)
Projected traffic1,167 by 2028
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-70/SEC-17/L3.49 over Big Robe Bayou built?

It was built in 1930, making it 95 years old in 2025.

What condition is US-70/SEC-17/L3.49 over Big Robe Bayou 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 2023.

How much traffic does US-70/SEC-17/L3.49 over Big Robe Bayou carry?

About 980 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is US-70/SEC-17/L3.49 over Big Robe Bayou?

The structure is 715 ft (217.9 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns US-70/SEC-17/L3.49 over Big Robe Bayou?

It is owned by the State Highway Agency.