US Bridges

Lilly Road over I-5

Good

Thurston County, Washington · 3.8 N JCT US 101 · Structure no. 0013197A0000000

Built
1988
37 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
219 ft
2 main spans
Daily traffic
15,200
2002 count
Owner
State
State Highway Agency

About this bridge

Lilly Road over I-5 is a prestressed concrete continuous box beam or girders - single or spread carrying Lilly Road over I-5 in Thurston 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 15,200 vehicles a day, roughly 2% of them trucks, projected to reach 27,603 by 2036. The structure is 219 ft (66.8 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLilly Road
CrossesI-5
Location3.8 N JCT US 101
RouteCity Street 0
CountyThurston County
StateWashington
Coordinates47.04458, -122.84433
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length219 ft (66.8 m)
Longest span108 ft (32.9 m)
Deck width70 ft (21.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,200 (2002)
Projected traffic27,603 by 2036
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lilly Road over I-5 built?

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

What condition is Lilly Road over I-5 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 September 2024.

How much traffic does Lilly Road over I-5 carry?

About 15,200 vehicles per day (2002 count), of which roughly 2% are trucks.

How long is Lilly Road over I-5?

The structure is 219 ft (66.8 m) long with a longest span of 108 ft (32.9 m) and a deck 70 ft wide.

Who owns Lilly Road over I-5?

It is owned by the State Highway Agency.