US Bridges

72nd Ave over Mill Creek

Good

Clark County, Washington · 3.5 E JCT I-5 · Structure no. 0018573C0000000

Built
2015
10 years old
Condition
Good
inspected December 2023
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
12,686
2018 count
Owner
County
County Highway Agency

About this bridge

72nd Ave over Mill Creek is a concrete frame carrying 72nd Ave 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 12,686 vehicles a day, roughly 12% of them trucks, projected to reach 9,372 by 2037. The structure is 28 ft (8.5 m) long and 106 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries72nd Ave
CrossesMill Creek
Location3.5 E JCT I-5
RouteCounty Highway 91250
Coordinates45.77961, -122.60016
Functional classUrban Collector

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width106 ft (32.4 m)
Roadway width86 ft (26.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,686 (2018)
Projected traffic9,372 by 2037
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 72nd Ave over Mill Creek built?

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

What condition is 72nd Ave 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 December 2023.

How much traffic does 72nd Ave over Mill Creek carry?

About 12,686 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is 72nd Ave over Mill Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 106 ft wide.

Who owns 72nd Ave over Mill Creek?

It is owned by the County Highway Agency.