US Bridges

Nelson Mtn Road over Chickahominy Creek

Fair

Lane County, Oregon · 015 NE of Walton · Structure no. 20626 367001039

Built
2004
21 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
315
2020 count
Owner
County
County Highway Agency

About this bridge

Nelson Mtn Road over Chickahominy Creek is a prestressed concrete slab carrying Nelson Mtn Road over Chickahominy Creek in Lane County, Oregon. It was built in 2004, so it is 21 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 5 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 315 vehicles a day, roughly 5% of them trucks, projected to reach 365 by 2025. The structure is 71 ft (21.6 m) long and 32 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesNelson Mtn Road
CrossesChickahominy Creek
Location015 NE of Walton
RouteCounty Highway C3670
CountyLane County
StateOregon
Coordinates44.03953, -123.58462
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 rating94 US tons
Inventory rating56 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length71 ft (21.6 m)
Longest span71 ft (21.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic315 (2020)
Projected traffic365 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 Nelson Mtn Road over Chickahominy Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Nelson Mtn Road over Chickahominy 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 2023.

How much traffic does Nelson Mtn Road over Chickahominy Creek carry?

About 315 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Nelson Mtn Road over Chickahominy Creek?

The structure is 71 ft (21.6 m) long with a longest span of 71 ft (21.6 m) and a deck 32 ft wide.

Who owns Nelson Mtn Road over Chickahominy Creek?

It is owned by the County Highway Agency.