US Bridges

County RD 820 over Trail Creek

FairPosted for load

Jackson County, Oregon · 0.03 Milepost · Structure no. 29C178820 00003

Built
1954
71 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
328
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 820 over Trail Creek is a steel stringer/multi-beam or girder carrying County RD 820 over Trail Creek in Jackson County, Oregon. It was built in 1954, so it is 71 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 load restriction.

It carries about 328 vehicles a day, roughly 10% of them trucks, projected to reach 383 by 2025. The structure is 76 ft (23.2 m) long and 22 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesCounty RD 820
CrossesTrail Creek
Location0.03 Milepost
RouteCounty Highway C0820
CountyJackson County
StateOregon
Coordinates42.6761, -122.84146
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment6: Equal to present minimum criteria
Operating rating19 US tons
Inventory rating14.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 20
Structure length76 ft (23.2 m)
Longest span50 ft (15.2 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic328 (2020)
Projected traffic383 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 County RD 820 over Trail Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is County RD 820 over Trail 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 June 2023.

How much traffic does County RD 820 over Trail Creek carry?

About 328 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 820 over Trail Creek?

The structure is 76 ft (23.2 m) long with a longest span of 50 ft (15.2 m) and a deck 22 ft wide.

Who owns County RD 820 over Trail Creek?

It is owned by the County Highway Agency.