US Bridges

Cow Creek Road over Salmon River;lucille Br

Fair

Idaho County, Idaho · At Lucille · Structure no. 000000000029360

Built
1937
88 years old, rebuilt 1975
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
341 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Cow Creek Road over Salmon River;lucille Br is a steel truss - thru carrying Cow Creek Road over Salmon River;lucille Br in Idaho County, Idaho. It was built in 1937 and reconstructed in 1975, so it is 88 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 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 45 by 2039. The structure is 341 ft (103.9 m) long and 21 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCow Creek Road
CrossesSalmon River;lucille Br
LocationAt Lucille
RouteCounty Highway 0
CountyIdaho County
StateIdaho
Coordinates45.53408, -116.31206
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+4 approach)
Design loadHS 20
Structure length341 ft (103.9 m)
Longest span252 ft (76.8 m)
Deck width21 ft (6.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.6 million (2019 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Cow Creek Road over Salmon River;lucille Br built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1975.

What condition is Cow Creek Road over Salmon River;lucille Br 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 Cow Creek Road over Salmon River;lucille Br carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Cow Creek Road over Salmon River;lucille Br?

The structure is 341 ft (103.9 m) long with a longest span of 252 ft (76.8 m) and a deck 21 ft wide.

Who owns Cow Creek Road over Salmon River;lucille Br?

It is owned by the County Highway Agency.