US Bridges

Smith Creek Road over M.Fk.Payette R;r.Smith C

Fair

Boise County, Idaho · 3.2 N. 0.2 E. Crouch · Structure no. 000000000026723

Built
1973
52 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
125 ft
2 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

Smith Creek Road over M.Fk.Payette R;r.Smith C is a steel stringer/multi-beam or girder carrying Smith Creek Road over M.Fk.Payette R;r.Smith C in Boise County, Idaho. It was built in 1973, so it is 52 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.

It carries about 25 vehicles a day, roughly 5% of them trucks, projected to reach 38 by 2039. The structure is 125 ft (38.1 m) long and 14 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSmith Creek Road
CrossesM.Fk.Payette R;r.Smith C
Location3.2 N. 0.2 E. Crouch
RouteCounty Highway 0
CountyBoise County
StateIdaho
Coordinates44.15603, -115.96408
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating28.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 15
Structure length125 ft (38.1 m)
Longest span61 ft (18.6 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic38 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith Creek Road over M.Fk.Payette R;r.Smith C built?

It was built in 1973, making it 52 years old in 2025.

What condition is Smith Creek Road over M.Fk.Payette R;r.Smith C 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 August 2024.

How much traffic does Smith Creek Road over M.Fk.Payette R;r.Smith C carry?

About 25 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Smith Creek Road over M.Fk.Payette R;r.Smith C?

The structure is 125 ft (38.1 m) long with a longest span of 61 ft (18.6 m) and a deck 14 ft wide.

Who owns Smith Creek Road over M.Fk.Payette R;r.Smith C?

It is owned by the County Highway Agency.