US Bridges

Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br)

Fair

Elmore County, Idaho · 9.5 S. 1.0 E. Prairie · Structure no. 000000000027855

Built
1959
66 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
154 ft
4 main spans
Daily traffic
20
2023 count
Owner
Local
Other Local Agency

About this bridge

Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br) is a concrete continuous slab carrying Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br) in Elmore County, Idaho. It was built in 1959, so it is 66 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2039. The structure is 154 ft (46.9 m) long and 16 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesNfd 131 RD
CrossesS.Fk.Boise R.(cow Cr.Br)
Location9.5 S. 1.0 E. Prairie
RouteCounty Highway 0
CountyElmore County
StateIdaho
Coordinates43.36614, -115.55245
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating65 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length154 ft (46.9 m)
Longest span43 ft (13.1 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2039
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br) built?

It was built in 1959, making it 66 years old in 2025.

What condition is Nfd 131 RD over S.Fk.Boise R.(cow Cr.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 Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br) carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br)?

The structure is 154 ft (46.9 m) long with a longest span of 43 ft (13.1 m) and a deck 16 ft wide.

Who owns Nfd 131 RD over S.Fk.Boise R.(cow Cr.Br)?

It is owned by the Other Local Agency.