Structure 4714A0000000 · Clallam County, WA

SR 112 over W Twin River

Carries SR 112 over W Twin River, 15.8 E Jct SR 113.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT160 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

160 ft end to end, longest span 24 ft: about 2 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.

Built195472 years old
Length160.1 ft48.8 m
Daily traffic835counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateWashington
CountyClallam
Location15.8 E Jct SR 113
CarriesSR 112
CrossesW Twin River
Coordinates48.16511, -123.95275

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length160.1 ft (48.8 m)
Max Span24.0 ft (7.3 m)
Deck Width34.1 ft (10.4 m)
Deck Area507.5 sq m
Main Spans7
Year Built1954

Traffic

Avg Daily Traffic835 (2023)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number0004714A0000000

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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