Structure 60704000001009 · Harney County, OR

Forest RD 45 over Silver Creek

Carries Forest RD 45 over Silver Creek, 15.2mi N Of Hwy20/rd45 Jc.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT135 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

135 ft end to end, longest span 67 ft. 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 channel-beam bridge.

Built1979rebuilt 1995
Length135.2 ft41.2 m
Daily traffic25counted 1994
Last inspectedSeptember 2021every 48 months

Location

StateOregon
CountyHarney
Location15.2mi N Of Hwy20/rd45 Jc
CarriesForest RD 45
CrossesSilver Creek
Coordinates43.70161, -119.63689

Physical Characteristics

MaterialPrestressed Concrete
DesignChannel Beam
Total Length135.2 ft (41.2 m)
Max Span67.3 ft (20.5 m)
Deck Width34.4 ft (10.5 m)
Deck Area432.6 sq m
Main Spans2
Year Built1979 (reconstructed 1995)

Traffic

Avg Daily Traffic25 (1994)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2021
Inspection FrequencyEvery 48 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number060704000001009

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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