US Bridges

Horton Road over Swartz Creek

Fair

Lane County, Oregon · 0280 MI North of Blachly · Structure no. 39C374364000232

Built
1977
48 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
491
2020 count
Owner
County
County Highway Agency

About this bridge

Horton Road over Swartz Creek is a prestressed concrete slab carrying Horton Road over Swartz Creek in Lane County, Oregon. It was built in 1977, so it is 48 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 491 vehicles a day, roughly 5% of them trucks, projected to reach 561 by 2025. The structure is 50 ft (15.2 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesHorton Road
CrossesSwartz Creek
Location0280 MI North of Blachly
RouteCounty Highway C3640
CountyLane County
StateOregon
Coordinates44.21462, -123.49633
Functional classRural Major 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic491 (2020)
Projected traffic561 by 2025
Trucks5%
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 Horton Road over Swartz Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Horton Road over Swartz 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 Horton Road over Swartz Creek carry?

About 491 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Horton Road over Swartz Creek?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 32 ft wide.

Who owns Horton Road over Swartz Creek?

It is owned by the County Highway Agency.