US Bridges

Harmony Road over Mill Creek

Fair

Polk County, Oregon · 015 N of Buell · Structure no. 53C023066700252

Built
1966
59 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
228 ft
3 main spans
Daily traffic
624
2020 count
Owner
County
County Highway Agency

About this bridge

Harmony Road over Mill Creek is a concrete continuous box beam or girders - single or spread carrying Harmony Road over Mill Creek in Polk County, Oregon. It was built in 1966, so it is 59 years old, older 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 624 vehicles a day, roughly 10% of them trucks, projected to reach 902 by 2040. The structure is 228 ft (69.5 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesHarmony Road
CrossesMill Creek
Location015 N of Buell
RouteCounty Highway 0
CountyPolk County
StateOregon
Coordinates45.04423, -123.43507
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length228 ft (69.5 m)
Longest span95 ft (29 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic624 (2020)
Projected traffic902 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Harmony Road over Mill Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Harmony Road over Mill 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 August 2024.

How much traffic does Harmony Road over Mill Creek carry?

About 624 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Harmony Road over Mill Creek?

The structure is 228 ft (69.5 m) long with a longest span of 95 ft (29 m) and a deck 34 ft wide.

Who owns Harmony Road over Mill Creek?

It is owned by the County Highway Agency.