US Bridges

Grande Ronde/E Ave over Rock Creek

Fair

Polk County, Oregon · 002 S of State HWY 18 · Structure no. 10002A068300016

Built
1962
63 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
169 ft
3 main spans
Daily traffic
360
2020 count
Owner
County
County Highway Agency

About this bridge

Grande Ronde/E Ave over Rock Creek is a concrete continuous tee beam carrying Grande Ronde/E Ave over Rock Creek in Polk County, Oregon. It was built in 1962, so it is 63 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 360 vehicles a day, roughly 10% of them trucks, projected to reach 427 by 2040. The structure is 169 ft (51.5 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGrande Ronde/E Ave
CrossesRock Creek
Location002 S of State HWY 18
RouteCounty Highway 0
CountyPolk County
StateOregon
Coordinates45.05679, -123.60936
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.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length169 ft (51.5 m)
Longest span76 ft (23.2 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2020)
Projected traffic427 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Grande Ronde/E Ave over Rock Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Grande Ronde/E Ave over Rock Creek 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 2024.

How much traffic does Grande Ronde/E Ave over Rock Creek carry?

About 360 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Grande Ronde/E Ave over Rock Creek?

The structure is 169 ft (51.5 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.

Who owns Grande Ronde/E Ave over Rock Creek?

It is owned by the County Highway Agency.