US Bridges

High Deck Road over South Santiam River

FairPosted for load

Linn County, Oregon · 020 MI W Cascadia Park · Structure no. 14025 091300167

Built
1945
80 years old, rebuilt 1991
Condition
Fair
inspected August 2023
Type
Truss - Thru
Wood or Timber
Length
174 ft
1 main span
Daily traffic
158
2021 count
Owner
County
County Highway Agency

About this bridge

High Deck Road over South Santiam River is a wood or timber truss - thru carrying High Deck Road over South Santiam River in Linn County, Oregon. It was built in 1945 and reconstructed in 1991, so it is 80 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. Its operating status is: posted for other load-capacity restriction.

It carries about 158 vehicles a day, roughly 15% of them trucks, projected to reach 206 by 2041. The structure is 174 ft (53 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHigh Deck Road
CrossesSouth Santiam River
Location020 MI W Cascadia Park
RouteCounty Highway C0913
StateOregon
Coordinates44.39157, -122.50975
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length174 ft (53 m)
Longest span105 ft (32 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck15 ft (4.4 m)

Traffic and service

Average daily traffic158 (2021)
Projected traffic206 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$980,000
NavigationNo navigation control on waterway

Frequently asked questions

When was High Deck Road over South Santiam River built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1991.

What condition is High Deck Road over South Santiam River 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 High Deck Road over South Santiam River carry?

About 158 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is High Deck Road over South Santiam River?

The structure is 174 ft (53 m) long with a longest span of 105 ft (32 m) and a deck 19 ft wide.

Who owns High Deck Road over South Santiam River?

It is owned by the County Highway Agency.