US Bridges

Park Entrance Road over South Santiam River

Fair

Linn County, Oregon · 15MI E of Sweet Home · Structure no. 17350 016F04141

Built
1994
31 years old
Condition
Fair
inspected November 2023
Type
Truss - Deck
Wood or Timber
Length
198 ft
1 main span
Daily traffic
600
2010 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Park Entrance Road over South Santiam River is a wood or timber truss - deck carrying Park Entrance Road over South Santiam River in Linn County, Oregon. It was built in 1994, so it is 31 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 600 vehicles a day, roughly 6% of them trucks, projected to reach 800 by 2030. The structure is 198 ft (60.4 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesPark Entrance Road
CrossesSouth Santiam River
Location15MI E of Sweet Home
CountyLinn County
StateOregon
Coordinates44.39812, -122.48113
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
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating27.9 US tons

Structure

Structure typeTruss - Deck
MaterialWood or Timber
DeckWood or timber
Main spans1 (+4 approach)
Design loadHS 20
Structure length198 ft (60.4 m)
Longest span120 ft (36.6 m)
Deck width22 ft (6.7 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2010)
Projected traffic800 by 2030
Trucks6%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Park Entrance Road over South Santiam River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Park Entrance 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 November 2023.

How much traffic does Park Entrance Road over South Santiam River carry?

About 600 vehicles per day (2010 count), of which roughly 6% are trucks.

How long is Park Entrance Road over South Santiam River?

The structure is 198 ft (60.4 m) long with a longest span of 120 ft (36.6 m) and a deck 22 ft wide.

Who owns Park Entrance Road over South Santiam River?

It is owned by the State Park, Forest, or Reservation Agency.