US Bridges

15th ST over Dirmain C O I Canal

Fair

Deschutes County, Oregon · 00.50 MI So Ferguson Road · Structure no. 16372 D16 00050

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Slab
Prestressed Concrete
Length
95 ft
2 main spans
Daily traffic
2,772
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

15th ST over Dirmain C O I Canal is a prestressed concrete slab carrying 15th ST over Dirmain C O I Canal in Deschutes County, Oregon. It was built in 1980, so it is 45 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 2,772 vehicles a day, roughly 2% of them trucks, projected to reach 3,192 by 2025. The structure is 95 ft (29 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries15th ST
CrossesDirmain C O I Canal
Location00.50 MI So Ferguson Road
RouteCounty Highway 3474
CountyDeschutes County
StateOregon
Coordinates44.02292, -121.28416
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length95 ft (29 m)
Longest span47 ft (14.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,772 (2020)
Projected traffic3,192 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 15th ST over Dirmain C O I Canal built?

It was built in 1980, making it 45 years old in 2025.

What condition is 15th ST over Dirmain C O I Canal 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 March 2024.

How much traffic does 15th ST over Dirmain C O I Canal carry?

About 2,772 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is 15th ST over Dirmain C O I Canal?

The structure is 95 ft (29 m) long with a longest span of 47 ft (14.3 m) and a deck 40 ft wide.

Who owns 15th ST over Dirmain C O I Canal?

It is owned by the City or Municipal Highway Agency.