US Bridges

County RD 18 over South Myrtle Creek

Good

Douglas County, Oregon · 10.7 MI E of Myrtle Creek · Structure no. T19C04301801071

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
272
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 18 over South Myrtle Creek is a prestressed concrete box beam or girders - multiple carrying County RD 18 over South Myrtle Creek in Douglas County, Oregon. It was built in 2024, so it is 1 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 272 vehicles a day, roughly 7% of them trucks, projected to reach 307 by 2025. The structure is 115 ft (35.1 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCounty RD 18
CrossesSouth Myrtle Creek
Location10.7 MI E of Myrtle Creek
RouteCounty Highway 0A382
CountyDouglas County
StateOregon
Coordinates43.03063, -123.10398
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourScour evaluation has not been made
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length115 ft (35.1 m)
Longest span109 ft (33.2 m)
Deck width20 ft (6.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic272 (2020)
Projected traffic307 by 2025
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 18 over South Myrtle Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is County RD 18 over South Myrtle Creek 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 October 2024.

How much traffic does County RD 18 over South Myrtle Creek carry?

About 272 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is County RD 18 over South Myrtle Creek?

The structure is 115 ft (35.1 m) long with a longest span of 109 ft (33.2 m) and a deck 20 ft wide.

Who owns County RD 18 over South Myrtle Creek?

It is owned by the County Highway Agency.