US Bridges

County Road No 810 over Griffin Cr/Madrona Lane

Fair

Jackson County, Oregon · 0.80 Milepost · Structure no. 29C162810 00080

Built
1959
66 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
501
2020 count
Owner
County
County Highway Agency

About this bridge

County Road No 810 over Griffin Cr/Madrona Lane is a concrete continuous culvert carrying County Road No 810 over Griffin Cr/Madrona Lane in Jackson County, Oregon. It was built in 1959, so it is 66 years old, older 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 501 vehicles a day, roughly 10% of them trucks, projected to reach 583 by 2025. The structure is 23 ft (7 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road No 810
CrossesGriffin Cr/Madrona Lane
Location0.80 Milepost
RouteCounty Highway C0810
CountyJackson County
StateOregon
Coordinates42.31609, -122.92432
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating21.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic501 (2020)
Projected traffic583 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Road No 810 over Griffin Cr/Madrona Lane built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road No 810 over Griffin Cr/Madrona Lane 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 June 2023.

How much traffic does County Road No 810 over Griffin Cr/Madrona Lane carry?

About 501 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County Road No 810 over Griffin Cr/Madrona Lane?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns County Road No 810 over Griffin Cr/Madrona Lane?

It is owned by the County Highway Agency.