US Bridges

Denney RD Conn over Fanno Creek

Fair

Washington County, Oregon · 2.8 MI NW Tigard Cc · Structure no. 13074A144C00310

Built
1979
46 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
2 main spans
Daily traffic
11,586
2022 count
Owner
State
State Highway Agency

About this bridge

Denney RD Conn over Fanno Creek is a prestressed concrete stringer/multi-beam or girder carrying Denney RD Conn over Fanno Creek in Washington County, Oregon. It was built in 1979, so it is 46 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 11,586 vehicles a day, roughly 3% of them trucks, projected to reach 12,100 by 2030. The structure is 150 ft (45.7 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesDenney RD Conn
CrossesFanno Creek
Location2.8 MI NW Tigard Cc
RouteState Highway 217
StateOregon
Coordinates45.46938, -122.7883
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span75 ft (22.9 m)
Deck width55 ft (16.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,586 (2022)
Projected traffic12,100 by 2030
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Denney RD Conn over Fanno Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Denney RD Conn over Fanno Creek 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 2024.

How much traffic does Denney RD Conn over Fanno Creek carry?

About 11,586 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Denney RD Conn over Fanno Creek?

The structure is 150 ft (45.7 m) long with a longest span of 75 ft (22.9 m) and a deck 55 ft wide.

Who owns Denney RD Conn over Fanno Creek?

It is owned by the State Highway Agency.