US Bridges

Fdr 581 over Kelly Creek

FairPosted for load

Clearwater County, Idaho · Old Kelly Ranger Station · Structure no. 010503000000007

Built
1940
85 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
288 ft
2 main spans
Daily traffic
30
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 581 over Kelly Creek is a steel truss - thru carrying Fdr 581 over Kelly Creek in Clearwater County, Idaho. It was built in 1940, so it is 85 years old, older than the Idaho average of 45.3 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, projected to reach 45 by 2045. The structure is 288 ft (87.8 m) long and 21 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesFdr 581
CrossesKelly Creek
LocationOld Kelly Ranger Station
RouteFederal Lands Road 581
CountyClearwater County
StateIdaho
Coordinates46.72142, -115.08575
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadH 15
Structure length288 ft (87.8 m)
Longest span121 ft (36.9 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (—)
Projected traffic45 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 581 over Kelly Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Fdr 581 over Kelly 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 June 2024.

How much traffic does Fdr 581 over Kelly Creek carry?

About 30 vehicles per day (latest count).

How long is Fdr 581 over Kelly Creek?

The structure is 288 ft (87.8 m) long with a longest span of 121 ft (36.9 m) and a deck 21 ft wide.

Who owns Fdr 581 over Kelly Creek?

It is owned by the U.S. Forest Service.