Structure 39C564523300002 · Lane County, OR

Dahlin Road over Mercer Lake/laverdierecr

Carries Dahlin Road over Mercer Lake/laverdierecr, 013 Mi E HWY 101.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT360 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

360 ft end to end, longest span 29 ft: about 5 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 slab bridge.

Built198046 years old
Length359.9 ft109.7 m
Daily traffic152counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateOregon
CountyLane
Location013 Mi E HWY 101
CarriesDahlin Road
CrossesMercer Lake/laverdierecr
Coordinates44.06621, -124.06916

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length359.9 ft (109.7 m)
Max Span28.9 ft (8.8 m)
Deck Width16.1 ft (4.9 m)
Deck Area537.5 sq m
Main Spans13
Year Built1980

Traffic

Avg Daily Traffic152 (2020)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number39C564523300002

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.

Nearby Bridges