US Bridges

Or 99W (hwy 91) over Or 217 (hwy 144)

Fair

Washington County, Oregon · 0.6 MI N of Tigard Cc · Structure no. 09519 01W 00865

Built
1967
58 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
216 ft
2 main spans
Daily traffic
44,600
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99W (hwy 91) over Or 217 (hwy 144) is a prestressed concrete stringer/multi-beam or girder carrying Or 99W (hwy 91) over Or 217 (hwy 144) in Washington County, Oregon. It was built in 1967, so it is 58 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 44,600 vehicles a day, roughly 3% of them trucks, projected to reach 49,300 by 2042. The structure is 216 ft (65.8 m) long and 84 ft wide.

Location

Open in Google Maps
CarriesOr 99W (hwy 91)
CrossesOr 217 (hwy 144)
Location0.6 MI N of Tigard Cc
RouteState Highway 99
CountyWashington County
StateOregon
Coordinates45.43517, -122.76179
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length216 ft (65.8 m)
Longest span99 ft (30.2 m)
Deck width84 ft (25.6 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,600 (2022)
Projected traffic49,300 by 2042
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 99W (hwy 91) over Or 217 (hwy 144) built?

It was built in 1967, making it 58 years old in 2025.

What condition is Or 99W (hwy 91) over Or 217 (hwy 144) 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 February 2024.

How much traffic does Or 99W (hwy 91) over Or 217 (hwy 144) carry?

About 44,600 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Or 99W (hwy 91) over Or 217 (hwy 144)?

The structure is 216 ft (65.8 m) long with a longest span of 99 ft (30.2 m) and a deck 84 ft wide.

Who owns Or 99W (hwy 91) over Or 217 (hwy 144)?

It is owned by the State Highway Agency.