US Bridges

HWY 160 over Milk Creek

Fair

Clackamas County, Oregon · In Mulino · Structure no. 20666 160 01081

Built
2009
16 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
170 ft
1 main span
Daily traffic
14,930
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 160 over Milk Creek is a prestressed concrete stringer/multi-beam or girder carrying HWY 160 over Milk Creek in Clackamas County, Oregon. It was built in 2009, so it is 16 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,930 vehicles a day, roughly 10% of them trucks, projected to reach 15,600 by 2042. The structure is 170 ft (51.8 m) long and 68 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesHWY 160
CrossesMilk Creek
LocationIn Mulino
RouteState Highway 213
CountyClackamas County
StateOregon
Coordinates45.22319, -122.58186
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length170 ft (51.8 m)
Longest span170 ft (51.8 m)
Deck width68 ft (20.7 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,930 (2022)
Projected traffic15,600 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 160 over Milk Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is HWY 160 over Milk Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does HWY 160 over Milk Creek carry?

About 14,930 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is HWY 160 over Milk Creek?

The structure is 170 ft (51.8 m) long with a longest span of 170 ft (51.8 m) and a deck 68 ft wide.

Who owns HWY 160 over Milk Creek?

It is owned by the State Highway Agency.