Structure 11752000035751 · Latah County, ID

Fdr 447 over Palouse River

Carries Fdr 447 over Palouse River, 19 Miles From Potlatch Id.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

48 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built20215 years old
Length47.9 ft14.6 m
Daily traffic151 lanes
Last inspectedSeptember 2023every 24 months

Location

StateIdaho
CountyLatah
Location19 Miles From Potlatch Id
CarriesFdr 447
CrossesPalouse River
Coordinates46.96481, -116.54002

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length47.9 ft (14.6 m)
Max Span47.9 ft (14.6 m)
Deck Width18.0 ft (5.5 m)
Deck Area80.3 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic15
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number011752000035751

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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