US Bridges

Butte Falls Prospt over Copco Canal

Fair

Jackson County, Oregon · 3.0 MI SE Prospect · Structure no. 07821 992 02092

Built
1954
71 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
36 ft
1 main span
Daily traffic
185
2020 count
Owner
County
County Highway Agency

About this bridge

Butte Falls Prospt over Copco Canal is a concrete tee beam carrying Butte Falls Prospt over Copco Canal in Jackson County, Oregon. It was built in 1954, so it is 71 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 185 vehicles a day, roughly 10% of them trucks, projected to reach 215 by 2025. The structure is 36 ft (11 m) long and 29 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesButte Falls Prospt
CrossesCopco Canal
Location3.0 MI SE Prospect
RouteCounty Highway 0A370
CountyJackson County
StateOregon
Coordinates42.73614, -122.44682
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span33 ft (10.1 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (2020)
Projected traffic215 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 Butte Falls Prospt over Copco Canal built?

It was built in 1954, making it 71 years old in 2025.

What condition is Butte Falls Prospt over Copco 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 June 2023.

How much traffic does Butte Falls Prospt over Copco Canal carry?

About 185 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Butte Falls Prospt over Copco Canal?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10.1 m) and a deck 29 ft wide.

Who owns Butte Falls Prospt over Copco Canal?

It is owned by the County Highway Agency.