US Bridges

County RD 555 over Whetstone Cr/E Gregory R

Good

Jackson County, Oregon · 1.18 Milepost · Structure no. 29C27 555 00118

Built
1960
65 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
896
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 555 over Whetstone Cr/E Gregory R is a concrete continuous culvert carrying County RD 555 over Whetstone Cr/E Gregory R in Jackson County, Oregon. It was built in 1960, so it is 65 years old, older 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 896 vehicles a day, roughly 10% of them trucks, projected to reach 1,046 by 2025. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 555
CrossesWhetstone Cr/E Gregory R
Location1.18 Milepost
RouteCounty Highway C0555
CountyJackson County
StateOregon
Coordinates42.4134, -122.8656
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic896 (2020)
Projected traffic1,046 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 Whetstone Cr/E Gregory R built?

It was built in 1960, making it 65 years old in 2025.

What condition is County RD 555 over Whetstone Cr/E Gregory R 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 July 2023.

How much traffic does County RD 555 over Whetstone Cr/E Gregory R carry?

About 896 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 555 over Whetstone Cr/E Gregory R?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns County RD 555 over Whetstone Cr/E Gregory R?

It is owned by the County Highway Agency.