US Bridges

Riddle RD over I-5 (hwy 001)

Good

Douglas County, Oregon · 01.4 MI S Missouri Btm · Structure no. 20628 001 10405

Built
2007
18 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
192 ft
2 main spans
Daily traffic
5,458
2022 count
Owner
State
State Highway Agency

About this bridge

Riddle RD over I-5 (hwy 001) is a prestressed concrete continuous box beam or girders - multiple carrying Riddle RD over I-5 (hwy 001) in Douglas County, Oregon. It was built in 2007, so it is 18 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.

It carries about 5,458 vehicles a day, roughly 27% of them trucks, projected to reach 7,600 by 2030. The structure is 192 ft (58.4 m) long and 69 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesRiddle RD
CrossesI-5 (hwy 001)
Location01.4 MI S Missouri Btm
RouteState Highway 99
CountyDouglas County
StateOregon
Coordinates42.97334, -123.3362
Functional classRural Minor Arterial

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.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length192 ft (58.4 m)
Longest span102 ft (31.1 m)
Deck width69 ft (21.1 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,458 (2022)
Projected traffic7,600 by 2030
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Riddle RD over I-5 (hwy 001) built?

It was built in 2007, making it 18 years old in 2025.

What condition is Riddle RD over I-5 (hwy 001) 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 January 2025.

How much traffic does Riddle RD over I-5 (hwy 001) carry?

About 5,458 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is Riddle RD over I-5 (hwy 001)?

The structure is 192 ft (58.4 m) long with a longest span of 102 ft (31.1 m) and a deck 69 ft wide.

Who owns Riddle RD over I-5 (hwy 001)?

It is owned by the State Highway Agency.