US Bridges

County RD 122G over Johns Creek

Fair

Coos County, Oregon · 0298 East Old Cooper Pit · Structure no. 11C105012200299

Built
1976
49 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
194
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 122G over Johns Creek is a prestressed concrete slab carrying County RD 122G over Johns Creek in Coos County, Oregon. It was built in 1976, so it is 49 years old, younger 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.

It carries about 194 vehicles a day, roughly 10% of them trucks, projected to reach 219 by 2025. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCounty RD 122G
CrossesJohns Creek
Location0298 East Old Cooper Pit
RouteCounty Highway C122G
CountyCoos County
StateOregon
Coordinates43.08395, -124.07006
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.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2024
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 alignment6: Equal to present minimum criteria
Operating rating65.4 US tons
Inventory rating50.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic194 (2020)
Projected traffic219 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 122G over Johns Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is County RD 122G over Johns 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 September 2024.

How much traffic does County RD 122G over Johns Creek carry?

About 194 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 122G over Johns Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 28 ft wide.

Who owns County RD 122G over Johns Creek?

It is owned by the County Highway Agency.