US Bridges

Horn Lane over Scott River

Fair

Siskiyou County, California · 1.0 MI East of SR 3 · Structure no. 02C0046

Built
1956
69 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
1 main span
Daily traffic
194
2011 count
Owner
County
County Highway Agency

About this bridge

Horn Lane over Scott River is a prestressed concrete stringer/multi-beam or girder carrying Horn Lane over Scott River in Siskiyou County, California. It was built in 1956, so it is 69 years old, older than the California average of 54.8 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 194 vehicles a day, roughly 40% of them trucks, projected to reach 436 by 2041. The structure is 192 ft (58.5 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesHorn Lane
CrossesScott River
Location1.0 MI East of SR 3
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.45739, -122.85274
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15.3 US tons
Inventory rating7.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span120 ft (36.6 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic194 (2011)
Projected traffic436 by 2041
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Horn Lane over Scott River built?

It was built in 1956, making it 69 years old in 2025.

What condition is Horn Lane over Scott River 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 2023.

How much traffic does Horn Lane over Scott River carry?

About 194 vehicles per day (2011 count), of which roughly 40% are trucks.

How long is Horn Lane over Scott River?

The structure is 192 ft (58.5 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.

Who owns Horn Lane over Scott River?

It is owned by the County Highway Agency.