US Bridges

County RD 47 over Cow Hollow Creek

Fair

Douglas County, Oregon · 1.2 MI S of Lookingglass · Structure no. 19C196 47 639

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
3 main spans
Daily traffic
2,320
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 47 over Cow Hollow Creek is a steel stringer/multi-beam or girder carrying County RD 47 over Cow Hollow Creek in Douglas County, Oregon. It was built in 1964, so it is 61 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 5 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 2,320 vehicles a day, roughly 7% of them trucks, projected to reach 2,625 by 2025. The structure is 76 ft (23.2 m) long and 29 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesCounty RD 47
CrossesCow Hollow Creek
Location1.2 MI S of Lookingglass
RouteCounty Highway 0A393
CountyDouglas County
StateOregon
Coordinates43.16119, -123.48191
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,320 (2020)
Projected traffic2,625 by 2025
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 47 over Cow Hollow Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is County RD 47 over Cow Hollow 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 July 2023.

How much traffic does County RD 47 over Cow Hollow Creek carry?

About 2,320 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is County RD 47 over Cow Hollow Creek?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 29 ft wide.

Who owns County RD 47 over Cow Hollow Creek?

It is owned by the County Highway Agency.