Structure 24595 · Jerome County, ID

990 South Road over T.f.northside Main Cnl

Carries 990 South Road over T.f.northside Main Cnl, 1.4 S. 3.4 E. Hazelton.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT180 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 5/9 · sets the rating

180 ft end to end, longest span 45 ft: about 3 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 tee-beam bridge.

Built192898 years old
Length180.1 ft54.9 m
Daily traffic620counted 2023
Last inspectedMarch 2023every 24 months

Location

StateIdaho
CountyJerome
Location1.4 S. 3.4 E. Hazelton
Carries990 South Road
CrossesT.f.northside Main Cnl
Coordinates42.57647, -114.05828

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length180.1 ft (54.9 m)
Max Span44.9 ft (13.7 m)
Deck Width26.2 ft (8 m)
Deck Area439.2 sq m
Main Spans4
Year Built1928

Traffic

Avg Daily Traffic620 (2023)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000024595

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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