US Bridges

C409 Diamond Cp RD over Mccoy Creek

Fair

Harney County, Oregon · 093 M OR205 Frenchglen Hy · Structure no. 25C15 C409 0932

Built
1991
34 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
123
2020 count
Owner
County
County Highway Agency

About this bridge

C409 Diamond Cp RD over Mccoy Creek is a wood or timber stringer/multi-beam or girder carrying C409 Diamond Cp RD over Mccoy Creek in Harney County, Oregon. It was built in 1991, so it is 34 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 6 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 123 vehicles a day, roughly 10% of them trucks, projected to reach 143 by 2025. The structure is 25 ft (7.6 m) long and 28 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesC409 Diamond Cp RD
CrossesMccoy Creek
Location093 M OR205 Frenchglen Hy
RouteCounty Highway C0409
CountyHarney County
StateOregon
Coordinates43.00873, -118.7208
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123 (2020)
Projected traffic143 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 C409 Diamond Cp RD over Mccoy Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is C409 Diamond Cp RD over Mccoy 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 C409 Diamond Cp RD over Mccoy Creek carry?

About 123 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is C409 Diamond Cp RD over Mccoy Creek?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns C409 Diamond Cp RD over Mccoy Creek?

It is owned by the County Highway Agency.