US Bridges

Stc 3894;CUPRUM RD over Weiser River;council Br.

Fair

Adams County, Idaho · 0.2 N. 0.5 W. Council · Structure no. 000000000020050

Built
1956
69 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
120 ft
3 main spans
Daily traffic
190
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3894;CUPRUM RD over Weiser River;council Br. is a concrete stringer/multi-beam or girder carrying Stc 3894;CUPRUM RD over Weiser River;council Br. in Adams County, Idaho. It was built in 1956, so it is 69 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 190 vehicles a day, roughly 27% of them trucks, projected to reach 285 by 2042. The structure is 120 ft (36.6 m) long and 30 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesStc 3894;CUPRUM RD
CrossesWeiser River;council Br.
Location0.2 N. 0.5 W. Council
RouteCounty Highway 3894
CountyAdams County
StateIdaho
Coordinates44.73183, -116.44969
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment7: Better than present minimum criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2023)
Projected traffic285 by 2042
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 3894;CUPRUM RD over Weiser River;council Br. built?

It was built in 1956, making it 69 years old in 2025.

What condition is Stc 3894;CUPRUM RD over Weiser River;council 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 Stc 3894;CUPRUM RD over Weiser River;council Br. carry?

About 190 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is Stc 3894;CUPRUM RD over Weiser River;council Br.?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns Stc 3894;CUPRUM RD over Weiser River;council Br.?

It is owned by the County Highway Agency.