US Bridges

Mossie Road over Dry Gully

FairPosted for load

Umatilla County, Oregon · 0.5 MI E Soap Hill Road · Structure no. 59C656147200048

Built
1952
73 years old
Condition
Fair
inspected July 2023
Type
Slab
Wood or Timber
Length
27 ft
1 main span
Daily traffic
150
2020 count
Owner
County
County Highway Agency

About this bridge

Mossie Road over Dry Gully is a wood or timber slab carrying Mossie Road over Dry Gully in Umatilla County, Oregon. It was built in 1952, so it is 73 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. Its operating status is: posted for other load-capacity restriction.

It carries about 150 vehicles a day, roughly 20% of them trucks, projected to reach 185 by 2025. The structure is 27 ft (8.2 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesMossie Road
CrossesDry Gully
Location0.5 MI E Soap Hill Road
RouteCounty Highway 0
CountyUmatilla County
StateOregon
Coordinates45.13041, -118.92435
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic185 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Mossie Road over Dry Gully built?

It was built in 1952, making it 73 years old in 2025.

What condition is Mossie Road over Dry Gully 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 Mossie Road over Dry Gully carry?

About 150 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Mossie Road over Dry Gully?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns Mossie Road over Dry Gully?

It is owned by the County Highway Agency.