US Bridges

CO RD 70 Zone B over Alex Branch-Polk Co.

Poor

Polk County, Arkansas · 3.70 M E JCT US71 & COR70 · Structure no. 000000000016180

Built
1937
88 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
52 ft
2 main spans
Daily traffic
334
2018 count
Owner
County
County Highway Agency

About this bridge

CO RD 70 Zone B over Alex Branch-Polk Co. is a concrete slab carrying CO RD 70 Zone B over Alex Branch-Polk Co. in Polk County, Arkansas. It was built in 1937, so it is 88 years old, older than the Arkansas average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 334 vehicles a day, roughly 1% of them trucks, projected to reach 73 by 2007. The structure is 52 ft (15.8 m) long and 12 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesCO RD 70 Zone B
CrossesAlex Branch-Polk Co.
Location3.70 M E JCT US71 & COR70
RouteCounty Highway 70
CountyPolk County
StateArkansas
Coordinates34.65561, -94.09094
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating42 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length52 ft (15.8 m)
Longest span26 ft (7.9 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic334 (2018)
Projected traffic73 by 2007
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$245,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD 70 Zone B over Alex Branch-Polk Co. built?

It was built in 1937, making it 88 years old in 2025.

What condition is CO RD 70 Zone B over Alex Branch-Polk Co. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does CO RD 70 Zone B over Alex Branch-Polk Co. carry?

About 334 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is CO RD 70 Zone B over Alex Branch-Polk Co.?

The structure is 52 ft (15.8 m) long with a longest span of 26 ft (7.9 m) and a deck 12 ft wide.

Who owns CO RD 70 Zone B over Alex Branch-Polk Co.?

It is owned by the County Highway Agency.