Structure 13535 · Gooding County, ID

US 30 over I 84 Wb-eb;w.bliss Ic

Carries US 30 over I 84 Wb-eb;w.bliss Ic, 1.7 W. Bliss.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT304 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

304 ft end to end, longest span 148 ft: about 4 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 box-beam bridge.

Built197452 years old
Length304.1 ft92.7 m
Daily traffic940counted 2023
Last inspectedApril 2021every 48 months

Location

StateIdaho
CountyGooding
Location1.7 W. Bliss
CarriesUS 30
CrossesI 84 Wb-eb;w.bliss Ic
Coordinates42.93844, -114.99353

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length304.1 ft (92.7 m)
Max Span148.0 ft (45.1 m)
Deck Width40.4 ft (12.3 m)
Deck Area1140.2 sq m
Main Spans2
Year Built1974

Traffic

Avg Daily Traffic940 (2023)
Truck Traffic12%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000013535

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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