Structure 37075 · Benewah County, ID

Railroad Grade RD over St. Joe River

Carries Railroad Grade RD over St. Joe River, 16.0 E. St. Maries.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT448 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

448 ft end to end, longest span 150 ft: about 6 semi-trucks nose to tail. Lengths and the semi-truck 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 through truss.

Built1908118 years old
Length448.2 ft136.6 m
Daily traffic40counted 2023
Last inspectedJune 2024every 24 months

Location

StateIdaho
CountyBenewah
Location16.0 E. St. Maries
CarriesRailroad Grade RD
CrossesSt. Joe River
Coordinates47.32161, -116.29169

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length448.2 ft (136.6 m)
Max Span149.9 ft (45.7 m)
Deck Width16.1 ft (4.9 m)
Deck Area669.3 sq m
Main Spans2
Year Built1908

Traffic

Avg Daily Traffic40 (2023)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number000000000037075

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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