US Bridges

North Albany Road over Thornton Lake

Fair

Benton County, Oregon · 05. N HWY 20 · Structure no. 22356 000 00050

Built
2015
10 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
3,750
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

North Albany Road over Thornton Lake is a prestressed concrete slab carrying North Albany Road over Thornton Lake in Benton County, Oregon. It was built in 2015, so it is 10 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 3,750 vehicles a day, roughly 10% of them trucks, projected to reach 5,354 by 2040. The structure is 70 ft (21.3 m) long and 49 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesNorth Albany Road
CrossesThornton Lake
Location05. N HWY 20
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.64888, -123.11559
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 rating72.1 US tons
Inventory rating55.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width49 ft (14.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2020)
Projected traffic5,354 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 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 North Albany Road over Thornton Lake built?

It was built in 2015, making it 10 years old in 2025.

What condition is North Albany Road over Thornton Lake 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 July 2024.

How much traffic does North Albany Road over Thornton Lake carry?

About 3,750 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is North Albany Road over Thornton Lake?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 49 ft wide.

Who owns North Albany Road over Thornton Lake?

It is owned by the City or Municipal Highway Agency.