US Bridges

I-705 Ramp over Flat Terrain

Good

Pierce County, Washington · 1.2 N JCT I-5 · Structure no. 0012747C0000000

Built
1987
38 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
223 ft
2 main spans
Daily traffic
6,123
2012 count
Owner
State
State Highway Agency

About this bridge

I-705 Ramp over Flat Terrain is a prestressed concrete continuous box beam or girders - multiple carrying I-705 Ramp over Flat Terrain in Pierce County, Washington. It was built in 1987, so it is 38 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 6,123 vehicles a day, roughly 3% of them trucks, projected to reach 10,532 by 2036. The structure is 223 ft (68 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-705 Ramp
CrossesFlat Terrain
Location1.2 N JCT I-5
RouteInterstate 705
Coordinates47.25078, -122.43603
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating58 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length223 ft (68 m)
Longest span108 ft (32.9 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,123 (2012)
Projected traffic10,532 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$4.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-705 Ramp over Flat Terrain built?

It was built in 1987, making it 38 years old in 2025.

What condition is I-705 Ramp over Flat Terrain 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 November 2024.

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

About 6,123 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is I-705 Ramp over Flat Terrain?

The structure is 223 ft (68 m) long with a longest span of 108 ft (32.9 m) and a deck 38 ft wide.

Who owns I-705 Ramp over Flat Terrain?

It is owned by the State Highway Agency.