US Bridges

Church Street over North Santiam River

Fair

Marion County, Oregon · 0.01 MI S HWY 22 Idanha · Structure no. 47B12 000000000

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Truss - Thru
Steel
Length
182 ft
1 main span
Daily traffic
247
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Church Street over North Santiam River is a steel truss - thru carrying Church Street over North Santiam River in Marion County, Oregon. It was built in 1976, so it is 49 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 247 vehicles a day, roughly 5% of them trucks, projected to reach 412 by 2041. The structure is 182 ft (55.5 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesChurch Street
CrossesNorth Santiam River
Location0.01 MI S HWY 22 Idanha
RouteCounty Highway C0000
StateOregon
Coordinates44.70077, -122.07599
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length182 ft (55.5 m)
Longest span100 ft (30.5 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic247 (2021)
Projected traffic412 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$932,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Church Street over North Santiam River built?

It was built in 1976, making it 49 years old in 2025.

What condition is Church Street over North 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 Church Street over North Santiam River carry?

About 247 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Church Street over North Santiam River?

The structure is 182 ft (55.5 m) long with a longest span of 100 ft (30.5 m) and a deck 18 ft wide.

Who owns Church Street over North Santiam River?

It is owned by the City or Municipal Highway Agency.