US Bridges

Solar Drive over Small Boat Canal

Good

Deschutes County, Oregon · 0190 MI Sou Spring Ri RD · Structure no. 17C5400E3500190

Built
1972
53 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
23 ft
1 main span
Daily traffic
1,539
2020 count
Owner
County
County Highway Agency

About this bridge

Solar Drive over Small Boat Canal is a prestressed concrete slab carrying Solar Drive over Small Boat Canal in Deschutes County, Oregon. It was built in 1972, so it is 53 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,539 vehicles a day, roughly 2% of them trucks, projected to reach 1,752 by 2025. The structure is 23 ft (7 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSolar Drive
CrossesSmall Boat Canal
Location0190 MI Sou Spring Ri RD
RouteCounty Highway 4123
StateOregon
Coordinates43.83694, -121.46527
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,539 (2020)
Projected traffic1,752 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Solar Drive over Small Boat Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is Solar Drive over Small Boat Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Solar Drive over Small Boat Canal carry?

About 1,539 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Solar Drive over Small Boat Canal?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Solar Drive over Small Boat Canal?

It is owned by the County Highway Agency.