US Bridges

CR 70-B (911=530) over Big Slough Ditch

Good

Clay County, Arkansas · 1 M E US 49 · Structure no. 000000000004794

Built
1997
28 years old
Condition
Good
inspected August 2023
Type
Channel Beam
Concrete
Length
159 ft
5 main spans
Daily traffic
186
2018 count
Owner
County
County Highway Agency

About this bridge

CR 70-B (911=530) over Big Slough Ditch is a concrete channel beam carrying CR 70-B (911=530) over Big Slough Ditch in Clay County, Arkansas. It was built in 1997, so it is 28 years old, younger than the Arkansas average of 45.1 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 186 vehicles a day, roughly 1% of them trucks, projected to reach 54 by 2016. The structure is 159 ft (48.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 70-B (911=530)
CrossesBig Slough Ditch
Location1 M E US 49
RouteCounty Highway 70
CountyClay County
StateArkansas
Coordinates36.28812, -90.2102
Functional classRural Local

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 inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length159 ft (48.4 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic186 (2018)
Projected traffic54 by 2016
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 70-B (911=530) over Big Slough Ditch built?

It was built in 1997, making it 28 years old in 2025.

What condition is CR 70-B (911=530) over Big Slough Ditch 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 August 2023.

How much traffic does CR 70-B (911=530) over Big Slough Ditch carry?

About 186 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is CR 70-B (911=530) over Big Slough Ditch?

The structure is 159 ft (48.4 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns CR 70-B (911=530) over Big Slough Ditch?

It is owned by the County Highway Agency.