US Bridges

Middle Rock Crk LN over Juniper Canyon Creek

Fair

Gilliam County, Oregon · 0.05 MI N of HWY 19 · Structure no. 21C16 532 00010

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
58
2020 count
Owner
County
County Highway Agency

About this bridge

Middle Rock Crk LN over Juniper Canyon Creek is a prestressed concrete slab carrying Middle Rock Crk LN over Juniper Canyon Creek in Gilliam County, Oregon. It was built in 1973, so it is 52 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 58 vehicles a day, roughly 10% of them trucks, projected to reach 58 by 2025. The structure is 34 ft (10.4 m) long and 32 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

CarriesMiddle Rock Crk LN
CrossesJuniper Canyon Creek
Location0.05 MI N of HWY 19
RouteCounty Highway 0
StateOregon
Coordinates45.5005, -120.17744
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating53.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2020)
Projected traffic58 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Middle Rock Crk LN over Juniper Canyon Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Middle Rock Crk LN over Juniper Canyon 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 Middle Rock Crk LN over Juniper Canyon Creek carry?

About 58 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Middle Rock Crk LN over Juniper Canyon Creek?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 32 ft wide.

Who owns Middle Rock Crk LN over Juniper Canyon Creek?

It is owned by the County Highway Agency.