US Bridges

CR 18 Benton Co. over So Prong Spavinaw CR

Fair

Benton County, Arkansas · 4 MI NE Decatur · Structure no. 000000000017805

Built
1965
60 years old
Condition
Fair
inspected January 2025
Type
Channel Beam
Concrete
Length
58 ft
3 main spans
Daily traffic
3,424
2018 count
Owner
County
County Highway Agency

About this bridge

CR 18 Benton Co. over So Prong Spavinaw CR is a concrete channel beam carrying CR 18 Benton Co. over So Prong Spavinaw CR in Benton County, Arkansas. It was built in 1965, so it is 60 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 3,424 vehicles a day, roughly 1% of them trucks, projected to reach 3,800 by 2030. The structure is 58 ft (17.7 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 18 Benton Co.
CrossesSo Prong Spavinaw CR
Location4 MI NE Decatur
RouteCounty Highway 18
CountyBenton County
StateArkansas
Coordinates36.37349, -94.4118
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
Deck7 GoodSome minor problems.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length58 ft (17.7 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,424 (2018)
Projected traffic3,800 by 2030
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$66,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 18 Benton Co. over So Prong Spavinaw CR built?

It was built in 1965, making it 60 years old in 2025.

What condition is CR 18 Benton Co. over So Prong Spavinaw CR 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 January 2025.

How much traffic does CR 18 Benton Co. over So Prong Spavinaw CR carry?

About 3,424 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is CR 18 Benton Co. over So Prong Spavinaw CR?

The structure is 58 ft (17.7 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns CR 18 Benton Co. over So Prong Spavinaw CR?

It is owned by the County Highway Agency.