US Bridges

CO 640 over Knokes Creek

Fair

Cleburne County, Alabama · CR 640 Knokes Creek · Structure no. 010632

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
50
2013 count
Owner
County
County Highway Agency

About this bridge

CO 640 over Knokes Creek is a steel stringer/multi-beam or girder carrying CO 640 over Knokes Creek in Cleburne County, Alabama. It was built in 1971, so it is 54 years old, older than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 50 vehicles a day, projected to reach 175 by 2035. The structure is 25 ft (7.7 m) long and 14 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCO 640
CrossesKnokes Creek
LocationCR 640 Knokes Creek
RouteCounty Highway 640
CountyCleburne County
StateAlabama
Coordinates33.50676, -85.40578
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
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 rating54.3 US tons
Inventory rating36.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length25 ft (7.7 m)
Longest span25 ft (7.7 m)
Deck width14 ft (4.4 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2013)
Projected traffic175 by 2035
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$151,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CO 640 over Knokes Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is CO 640 over Knokes 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 September 2023.

How much traffic does CO 640 over Knokes Creek carry?

About 50 vehicles per day (2013 count).

How long is CO 640 over Knokes Creek?

The structure is 25 ft (7.7 m) long with a longest span of 25 ft (7.7 m) and a deck 14 ft wide.

Who owns CO 640 over Knokes Creek?

It is owned by the County Highway Agency.