US Bridges

NF-2212 over Detroit Lake

Fair

Linn County, Oregon · Detroit Dam · Structure no. CEPNPPOR000DT01

Built
1954
71 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
303 ft
6 main spans
Daily traffic
100
2013 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

NF-2212 over Detroit Lake is a concrete stringer/multi-beam or girder carrying NF-2212 over Detroit Lake in Linn 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 100 vehicles a day, roughly 25% of them trucks, projected to reach 200 by 2043. The structure is 303 ft (92.3 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesNF-2212
CrossesDetroit Lake
LocationDetroit Dam
CountyLinn County
StateOregon
Coordinates44.72157, -122.25018
Functional classRural Local

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length303 ft (92.3 m)
Longest span43 ft (13.1 m)
Deck width29 ft (8.9 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2013)
Projected traffic200 by 2043
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$224,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NF-2212 over Detroit Lake built?

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

What condition is NF-2212 over Detroit 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 May 2023.

How much traffic does NF-2212 over Detroit Lake carry?

About 100 vehicles per day (2013 count), of which roughly 25% are trucks.

How long is NF-2212 over Detroit Lake?

The structure is 303 ft (92.3 m) long with a longest span of 43 ft (13.1 m) and a deck 29 ft wide.

Who owns NF-2212 over Detroit Lake?

It is owned by the Corps of Engineers (Civil).