US Bridges

Sumich Road over Overflow-Lake Creek

Fair

Lane County, Oregon · 010 MI NE Triangle Lake · Structure no. 39C379365600002

Built
1990
35 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
66
2020 count
Owner
County
County Highway Agency

About this bridge

Sumich Road over Overflow-Lake Creek is a prestressed concrete slab carrying Sumich Road over Overflow-Lake Creek in Lane County, Oregon. It was built in 1990, so it is 35 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 66 vehicles a day, projected to reach 76 by 2025. The structure is 65 ft (19.8 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSumich Road
CrossesOverflow-Lake Creek
Location010 MI NE Triangle Lake
RouteCounty Highway C3656
CountyLane County
StateOregon
Coordinates44.18665, -123.55351
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic66 (2020)
Projected traffic76 by 2025
Trucks0%
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 Sumich Road over Overflow-Lake Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Sumich Road over Overflow-Lake 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 Sumich Road over Overflow-Lake Creek carry?

About 66 vehicles per day (2020 count).

How long is Sumich Road over Overflow-Lake Creek?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 32 ft wide.

Who owns Sumich Road over Overflow-Lake Creek?

It is owned by the County Highway Agency.