US Bridges

N-E Ramp over Center Street

Good

Pierce County, Washington · WB Nalley Valley · Structure no. 0017594D0000000

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
729 ft
5 main spans
Daily traffic
9,600
2022 count
Owner
State
State Highway Agency

About this bridge

N-E Ramp over Center Street is a prestressed concrete continuous stringer/multi-beam or girder carrying N-E Ramp over Center Street in Pierce County, Washington. It was built in 2011, so it is 14 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,600 vehicles a day, roughly 7% of them trucks, projected to reach 13,821 by 2039. The structure is 729 ft (222.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN-E Ramp
CrossesCenter Street
LocationWB Nalley Valley
RouteState Highway 16
CountyPierce County
StateWashington
Coordinates47.23372, -122.46344
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length729 ft (222.2 m)
Longest span156 ft (47.5 m)
Deck width29 ft (8.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,600 (2022)
Projected traffic13,821 by 2039
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was N-E Ramp over Center Street built?

It was built in 2011, making it 14 years old in 2025.

What condition is N-E Ramp over Center Street 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 May 2023.

How much traffic does N-E Ramp over Center Street carry?

About 9,600 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is N-E Ramp over Center Street?

The structure is 729 ft (222.2 m) long with a longest span of 156 ft (47.5 m) and a deck 29 ft wide.

Who owns N-E Ramp over Center Street?

It is owned by the State Highway Agency.