US Bridges

Sumich Road over Lake Creek

Fair

Lane County, Oregon · 010 MI NE Triangle Lake · Structure no. 39C381365600023

Built
1988
37 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
127 ft
3 main spans
Daily traffic
66
2020 count
Owner
County
County Highway Agency

About this bridge

Sumich Road over Lake Creek is a prestressed concrete slab carrying Sumich Road over Lake Creek in Lane County, Oregon. It was built in 1988, so it is 37 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 127 ft (38.7 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSumich Road
CrossesLake Creek
Location010 MI NE Triangle Lake
RouteCounty Highway C3656
CountyLane County
StateOregon
Coordinates44.18377, -123.55405
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79 US tons
Inventory rating39 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span42 ft (12.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 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 Lake Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Sumich Road over 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 Lake Creek carry?

About 66 vehicles per day (2020 count).

How long is Sumich Road over Lake Creek?

The structure is 127 ft (38.7 m) long with a longest span of 42 ft (12.8 m) and a deck 28 ft wide.

Who owns Sumich Road over Lake Creek?

It is owned by the County Highway Agency.