US Bridges

CR 20 Izard County over Knob Creek

Fair

Izard County, Arkansas · 2.0 Mi. West SH 9 · Structure no. 000000000023938

Built
2017
8 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
41 ft
5 main spans
Daily traffic
21
2018 count
Owner
County
County Highway Agency

About this bridge

CR 20 Izard County over Knob Creek is a concrete culvert carrying CR 20 Izard County over Knob Creek in Izard County, Arkansas. It was built in 2017, so it is 8 years old, younger 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 21 vehicles a day, roughly 1% of them trucks, projected to reach 30 by 2038. The structure is 41 ft (12.5 m) long and 19 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCR 20 Izard County
CrossesKnob Creek
Location2.0 Mi. West SH 9
RouteCounty Highway 20
CountyIzard County
StateArkansas
Coordinates36.11439, -91.96542
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating24 US tons
Inventory rating19 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span7 ft (2.1 m)
Deck width19 ft (5.7 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2018)
Projected traffic30 by 2038
Trucks1%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 20 Izard County over Knob Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is CR 20 Izard County over Knob Creek 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 2024.

How much traffic does CR 20 Izard County over Knob Creek carry?

About 21 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is CR 20 Izard County over Knob Creek?

The structure is 41 ft (12.5 m) long with a longest span of 7 ft (2.1 m) and a deck 19 ft wide.

Who owns CR 20 Izard County over Knob Creek?

It is owned by the County Highway Agency.