US Bridges

Boyd Acres Road over North Unit Main Canal

Fair

Deschutes County, Oregon · 003 MI N of Studio Road · Structure no. 09409 D05 00025

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
10,864
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Boyd Acres Road over North Unit Main Canal is a prestressed concrete stringer/multi-beam or girder carrying Boyd Acres Road over North Unit Main Canal in Deschutes County, Oregon. It was built in 1965, so it is 60 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 10,864 vehicles a day, roughly 7% of them trucks, projected to reach 16,987 by 2025. The structure is 62 ft (18.9 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBoyd Acres Road
CrossesNorth Unit Main Canal
Location003 MI N of Studio Road
RouteCounty Highway 3157
StateOregon
Coordinates44.08097, -121.29541
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width39 ft (11.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,864 (2020)
Projected traffic16,987 by 2025
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$318,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Boyd Acres Road over North Unit Main Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is Boyd Acres Road over North Unit Main 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 Boyd Acres Road over North Unit Main Canal carry?

About 10,864 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Boyd Acres Road over North Unit Main Canal?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 39 ft wide.

Who owns Boyd Acres Road over North Unit Main Canal?

It is owned by the City or Municipal Highway Agency.