US Bridges

SH 57 over Upper W.Branch Priest R.

Fair

Bonner County, Idaho · 19.6 N. Priest River · Structure no. 000000000014895

Built
1937
88 years old, rebuilt 1985
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
296 ft
1 main span
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

SH 57 over Upper W.Branch Priest R. is a concrete arch - deck carrying SH 57 over Upper W.Branch Priest R. in Bonner County, Idaho. It was built in 1937 and reconstructed in 1985, 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 2,700 vehicles a day, roughly 5% of them trucks, projected to reach 4,050 by 2042. The structure is 296 ft (90.2 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSH 57
CrossesUpper W.Branch Priest R.
Location19.6 N. Priest River
RouteState Highway 57
CountyBonner County
StateIdaho
Coordinates48.42808, -116.95622
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadH 15
Structure length296 ft (90.2 m)
Longest span131 ft (39.9 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic4,050 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.1 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 57 over Upper W.Branch Priest R. built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1985.

What condition is SH 57 over Upper W.Branch Priest R. 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 2023.

How much traffic does SH 57 over Upper W.Branch Priest R. carry?

About 2,700 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 57 over Upper W.Branch Priest R.?

The structure is 296 ft (90.2 m) long with a longest span of 131 ft (39.9 m) and a deck 27 ft wide.

Who owns SH 57 over Upper W.Branch Priest R.?

It is owned by the State Highway Agency.