US Bridges

Riggs Road over Irrigation Ditch

GoodPosted for load

Crook County, Oregon · 2.45 on Riggs Rd. · Structure no. 20325 211 00000

Built
2006
19 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
594
2020 count
Owner
County
County Highway Agency

About this bridge

Riggs Road over Irrigation Ditch is a concrete culvert carrying Riggs Road over Irrigation Ditch in Crook County, Oregon. It was built in 2006, so it is 19 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. Its operating status is: posted for load restriction.

It carries about 594 vehicles a day, roughly 5% of them trucks, projected to reach 644 by 2025. The structure is 22 ft (6.7 m) long and 32 ft wide.

CarriesRiggs Road
CrossesIrrigation Ditch
Location2.45 on Riggs Rd.
RouteCounty Highway C0211
StateOregon
Coordinates44.23309, -121.01214
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic594 (2020)
Projected traffic644 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Riggs Road over Irrigation Ditch built?

It was built in 2006, making it 19 years old in 2025.

What condition is Riggs Road over Irrigation Ditch 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 December 2024.

How much traffic does Riggs Road over Irrigation Ditch carry?

About 594 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Riggs Road over Irrigation Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns Riggs Road over Irrigation Ditch?

It is owned by the County Highway Agency.