US Bridges

SR 507 NB over I-5 Ramp

Good

Lewis County, Washington · JCT I-5 · Structure no. 0018473B0000000

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
1 main span
Daily traffic
7,822
2023 count
Owner
State
State Highway Agency

About this bridge

SR 507 NB over I-5 Ramp is a prestressed concrete stringer/multi-beam or girder carrying SR 507 NB over I-5 Ramp in Lewis County, Washington. It was built in 2014, so it is 11 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 7,822 vehicles a day, roughly 3% of them trucks, projected to reach 10,222 by 2039. The structure is 154 ft (46.9 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 507 NB
CrossesI-5 Ramp
LocationJCT I-5
RouteState Highway 507
CountyLewis County
StateWashington
Coordinates46.70682, -122.97429
Functional classUrban Minor Arterial

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length154 ft (46.9 m)
Longest span149 ft (45.4 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,822 (2023)
Projected traffic10,222 by 2039
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$3.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 507 NB over I-5 Ramp built?

It was built in 2014, making it 11 years old in 2025.

What condition is SR 507 NB over I-5 Ramp 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 October 2024.

How much traffic does SR 507 NB over I-5 Ramp carry?

About 7,822 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 507 NB over I-5 Ramp?

The structure is 154 ft (46.9 m) long with a longest span of 149 ft (45.4 m) and a deck 47 ft wide.

Who owns SR 507 NB over I-5 Ramp?

It is owned by the State Highway Agency.