US Bridges

I-705 Ramp over Terrain

Fair

Pierce County, Washington · 0.2 N JCT I-5 · Structure no. 0012992C0000000

Built
1988
37 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
418 ft
3 main spans
Daily traffic
4,510
2012 count
Owner
State
State Highway Agency

About this bridge

I-705 Ramp over Terrain is a prestressed concrete continuous box beam or girders - single or spread carrying I-705 Ramp over Terrain 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,510 vehicles a day, roughly 3% of them trucks, projected to reach 7,757 by 2036. The structure is 418 ft (127.4 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-705 Ramp
CrossesTerrain
Location0.2 N JCT I-5
RouteInterstate 705
CountyPierce County
StateWashington
Coordinates47.23551, -122.43154
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating58 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length418 ft (127.4 m)
Longest span155 ft (47.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,510 (2012)
Projected traffic7,757 by 2036
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$6.2 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-705 Ramp over Terrain built?

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

What condition is I-705 Ramp over Terrain in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does I-705 Ramp over Terrain carry?

About 4,510 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is I-705 Ramp over Terrain?

The structure is 418 ft (127.4 m) long with a longest span of 155 ft (47.2 m) and a deck 29 ft wide.

Who owns I-705 Ramp over Terrain?

It is owned by the State Highway Agency.