US Bridges

Quartzville DR over Middle Fork Santiam R.

Fair

Linn County, Oregon · 004 MI N CR 932 · Structure no. 91242 091200042

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
403 ft
4 main spans
Daily traffic
1,133
2021 count
Owner
County
County Highway Agency

About this bridge

Quartzville DR over Middle Fork Santiam R. is a prestressed concrete stringer/multi-beam or girder carrying Quartzville DR over Middle Fork Santiam R. in Linn County, Oregon. It was built in 1965, so it is 60 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 1,133 vehicles a day, roughly 18% of them trucks, projected to reach 1,591 by 2041. The structure is 403 ft (122.8 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesQuartzville DR
CrossesMiddle Fork Santiam R.
Location004 MI N CR 932
RouteCounty Highway 0
CountyLinn County
StateOregon
Coordinates44.42727, -122.61739
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length403 ft (122.8 m)
Longest span100 ft (30.5 m)
Deck width33 ft (10 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,133 (2021)
Projected traffic1,591 by 2041
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Quartzville DR over Middle Fork Santiam R. built?

It was built in 1965, making it 60 years old in 2025.

What condition is Quartzville DR over Middle Fork Santiam R. 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 August 2023.

How much traffic does Quartzville DR over Middle Fork Santiam R. carry?

About 1,133 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is Quartzville DR over Middle Fork Santiam R.?

The structure is 403 ft (122.8 m) long with a longest span of 100 ft (30.5 m) and a deck 33 ft wide.

Who owns Quartzville DR over Middle Fork Santiam R.?

It is owned by the County Highway Agency.