US Bridges

County RD 555 over Swanson Cr/E Gregory Rd.

Good

Jackson County, Oregon · 0.07 Milepost · Structure no. 22357 555 00007

Built
2015
10 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
1,093
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 555 over Swanson Cr/E Gregory Rd. is a prestressed concrete slab carrying County RD 555 over Swanson Cr/E Gregory Rd. in Jackson County, Oregon. It was built in 2015, so it is 10 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,093 vehicles a day, roughly 10% of them trucks, projected to reach 1,273 by 2025. The structure is 61 ft (18.5 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 555
CrossesSwanson Cr/E Gregory Rd.
Location0.07 Milepost
RouteCounty Highway C0555
CountyJackson County
StateOregon
Coordinates42.41114, -122.88396
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length61 ft (18.5 m)
Longest span58 ft (17.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,093 (2020)
Projected traffic1,273 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 555 over Swanson Cr/E Gregory Rd. built?

It was built in 2015, making it 10 years old in 2025.

What condition is County RD 555 over Swanson Cr/E Gregory Rd. in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does County RD 555 over Swanson Cr/E Gregory Rd. carry?

About 1,093 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 555 over Swanson Cr/E Gregory Rd.?

The structure is 61 ft (18.5 m) long with a longest span of 58 ft (17.7 m) and a deck 34 ft wide.

Who owns County RD 555 over Swanson Cr/E Gregory Rd.?

It is owned by the County Highway Agency.