US Bridges

Stc 4721;BRIDGE ST over S.Fk.Clearwater River

Fair

Idaho County, Idaho · In Stites · Structure no. 000000000029250

Built
1961
64 years old
Condition
Fair
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
3 main spans
Daily traffic
780
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 4721;BRIDGE ST over S.Fk.Clearwater River is a prestressed concrete stringer/multi-beam or girder carrying Stc 4721;BRIDGE ST over S.Fk.Clearwater River in Idaho County, Idaho. It was built in 1961, so it is 64 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 780 vehicles a day, roughly 5% of them trucks, projected to reach 1,170 by 2042. The structure is 183 ft (55.8 m) long and 29 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesStc 4721;BRIDGE ST
CrossesS.Fk.Clearwater River
LocationIn Stites
RouteCounty Highway 4721
CountyIdaho County
StateIdaho
Coordinates46.09128, -115.978
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length183 ft (55.8 m)
Longest span59 ft (18 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic780 (2023)
Projected traffic1,170 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed29.8 mi (48 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$2.2 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 4721;BRIDGE ST over S.Fk.Clearwater River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Stc 4721;BRIDGE ST over S.Fk.Clearwater River 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 2021.

How much traffic does Stc 4721;BRIDGE ST over S.Fk.Clearwater River carry?

About 780 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Stc 4721;BRIDGE ST over S.Fk.Clearwater River?

The structure is 183 ft (55.8 m) long with a longest span of 59 ft (18 m) and a deck 29 ft wide.

Who owns Stc 4721;BRIDGE ST over S.Fk.Clearwater River?

It is owned by the County Highway Agency.