US Bridges

I-705 SB S-S Ramp over I-705 SB Ramp Streets+

Good

Pierce County, Washington · 0.2 N JCT I-5 · Structure no. 0012992D0000000

Built
1988
37 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
3,364 ft
23 main spans
Daily traffic
20,205
2023 count
Owner
State
State Highway Agency

About this bridge

I-705 SB S-S Ramp over I-705 SB Ramp Streets+ is a prestressed concrete continuous box beam or girders - multiple carrying I-705 SB S-S Ramp over I-705 SB Ramp Streets+ in Pierce County, Washington. It was built in 1988, so it is 37 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,205 vehicles a day, roughly 4% of them trucks, projected to reach 30,166 by 2039. The structure is 3,364 ft (1,025.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-705 SB S-S Ramp
CrossesI-705 SB Ramp Streets+
Location0.2 N JCT I-5
RouteInterstate 705
CountyPierce County
StateWashington
Coordinates47.23346, -122.43397
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans23
Design loadHS 20 + Mod
Structure length3,364 ft (1,025.3 m)
Longest span170 ft (51.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,205 (2023)
Projected traffic30,166 by 2039
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$63.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-705 SB S-S Ramp over I-705 SB Ramp Streets+ built?

It was built in 1988, making it 37 years old in 2025.

What condition is I-705 SB S-S Ramp over I-705 SB Ramp Streets+ in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does I-705 SB S-S Ramp over I-705 SB Ramp Streets+ carry?

About 20,205 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I-705 SB S-S Ramp over I-705 SB Ramp Streets+?

The structure is 3,364 ft (1,025.3 m) long with a longest span of 170 ft (51.8 m) and a deck 41 ft wide.

Who owns I-705 SB S-S Ramp over I-705 SB Ramp Streets+?

It is owned by the State Highway Agency.