US Bridges

Chezem Road over Spencer Creek

Fair

Lane County, Oregon · 036 MI SW Eugene · Structure no. 39C134127800011

Built
1974
51 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
56 ft
2 main spans
Daily traffic
597
2020 count
Owner
County
County Highway Agency

About this bridge

Chezem Road over Spencer Creek is a prestressed concrete slab carrying Chezem Road over Spencer Creek in Lane County, Oregon. It was built in 1974, so it is 51 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 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 597 vehicles a day, roughly 10% of them trucks, projected to reach 682 by 2025. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesChezem Road
CrossesSpencer Creek
Location036 MI SW Eugene
RouteCounty Highway C1278
CountyLane County
StateOregon
Coordinates43.98796, -123.16311
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic597 (2020)
Projected traffic682 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Chezem Road over Spencer Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Chezem Road over Spencer 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 July 2024.

How much traffic does Chezem Road over Spencer Creek carry?

About 597 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Chezem Road over Spencer Creek?

The structure is 56 ft (17.1 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns Chezem Road over Spencer Creek?

It is owned by the County Highway Agency.