Structure 61506000001509 · Douglas County, OR

Road over North Umpqua River

Carries Road over North Umpqua River, No Data Entered.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
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 FT237 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

237 ft end to end: 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 deck arch.

Built1936rebuilt 1983
Length236.9 ft72.2 m
Daily traffic195counted 2020
Last inspectedAugust 2024every 24 months

Location

StateOregon
CountyDouglas
LocationNo Data Entered
CarriesRoad
CrossesNorth Umpqua River
Coordinates43.34276, -122.73606

Physical Characteristics

MaterialWood or Timber
DesignArch - Deck
Total Length236.9 ft (72.2 m)
Max Span134.8 ft (41.1 m)
Deck Width24.6 ft (7.5 m)
Deck Area541.5 sq m
Main Spans1
Year Built1936 (reconstructed 1983)

Traffic

Avg Daily Traffic195 (2020)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number061506000001509

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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