US Bridges

Access Road over Whychus Creek

Fair

Deschutes County, Oregon · 11 M SW of Sisters · Structure no. 060105000001026

Built
1962
63 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
1 main span
Daily traffic
50
1988 count
Owner
Federal
U.S. Forest Service

About this bridge

Access Road over Whychus Creek is a wood or timber stringer/multi-beam or girder carrying Access Road over Whychus Creek in Deschutes 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 47 ft (14.3 m) long and 20 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

CarriesAccess Road
CrossesWhychus Creek
Location11 M SW of Sisters
RouteFederal Lands Road 15140
StateOregon
Coordinates44.18947, -121.66319
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating36.9 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadOther
Structure length47 ft (14.3 m)
Longest span46 ft (14 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1988)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of relocation of road
Estimated improvement cost$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Access Road over Whychus Creek built?

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

What condition is Access Road over Whychus 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 November 2024.

How much traffic does Access Road over Whychus Creek carry?

About 50 vehicles per day (1988 count).

How long is Access Road over Whychus Creek?

The structure is 47 ft (14.3 m) long with a longest span of 46 ft (14 m) and a deck 20 ft wide.

Who owns Access Road over Whychus Creek?

It is owned by the U.S. Forest Service.