Structure 12992B0000000 · Pierce County, WA

I-705 NB over I-705 NB Ramp Streets+

Carries I-705 NB over I-705 NB Ramp Streets+, 0.3 N Jct I-5.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,588 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 7/9

2,588 ft end to end, longest span 170 ft: about 7.2 football fields. 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 box-beam bridge.

Built198838 years old
Length2587.9 ft788.8 m
Daily traffic20,205counted 2023
Last inspectedAugust 2023every 24 months

Location

StateWashington
CountyPierce
Location0.3 N Jct I-5
CarriesI-705 NB
CrossesI-705 NB Ramp Streets+
Coordinates47.23534, -122.43114

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length2587.9 ft (788.8 m)
Max Span169.9 ft (51.8 m)
Deck Width41.0 ft (12.5 m)
Deck Area9,860 sq m
Main Spans18
Year Built1988

Traffic

Avg Daily Traffic20,205 (2023)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge16

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0012992B0000000

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