US Bridges

Mountain Sheep LN over Deschutes R. Sheep LN

Fair

Deschutes County, Oregon · SE 1/4 Sec 3 T21S R10E · Structure no. 16480 000000110

Built
1981
44 years old
Condition
Fair
inspected March 2024
Type
Slab
Prestressed Concrete
Length
121 ft
3 main spans
Daily traffic
66
2020 count
Owner
Local
Other Local Agency

About this bridge

Mountain Sheep LN over Deschutes R. Sheep LN is a prestressed concrete slab carrying Mountain Sheep LN over Deschutes R. Sheep LN in Deschutes County, Oregon. It was built in 1981, so it is 44 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 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 66 vehicles a day, roughly 2% of them trucks, projected to reach 75 by 2025. The structure is 121 ft (36.9 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMountain Sheep LN
CrossesDeschutes R. Sheep LN
LocationSE 1/4 Sec 3 T21S R10E
RouteCounty Highway 4000
CountyDeschutes County
StateOregon
Coordinates43.77686, -121.51537
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span40 ft (12.2 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic66 (2020)
Projected traffic75 by 2025
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 Mountain Sheep LN over Deschutes R. Sheep LN built?

It was built in 1981, making it 44 years old in 2025.

What condition is Mountain Sheep LN over Deschutes R. Sheep LN 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 March 2024.

How much traffic does Mountain Sheep LN over Deschutes R. Sheep LN carry?

About 66 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Mountain Sheep LN over Deschutes R. Sheep LN?

The structure is 121 ft (36.9 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns Mountain Sheep LN over Deschutes R. Sheep LN?

It is owned by the Other Local Agency.