US Bridges

SR 502 over Mill Creek

Good

Clark County, Washington · 3.7 E JCT I-5 · Structure no. 0018573B0000000

Built
2015
10 years old
Condition
Good
inspected November 2021
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
24,462
2023 count
Owner
State
State Highway Agency

About this bridge

SR 502 over Mill Creek is a concrete frame carrying SR 502 over Mill Creek in Clark County, Washington. It was built in 2015, so it is 10 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 24,462 vehicles a day, roughly 9% of them trucks, projected to reach 26,570 by 2039. The structure is 26 ft (7.9 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 502
CrossesMill Creek
Location3.7 E JCT I-5
RouteState Highway 502
Coordinates45.78017, -122.59833
Functional classUrban Other Principal 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating62.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width100 ft (30.5 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,462 (2023)
Projected traffic26,570 by 2039
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$842,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 502 over Mill Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is SR 502 over Mill Creek 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 2021.

How much traffic does SR 502 over Mill Creek carry?

About 24,462 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 502 over Mill Creek?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 100 ft wide.

Who owns SR 502 over Mill Creek?

It is owned by the State Highway Agency.