US Bridges

Horse Creek RD over Klamath River

PoorPosted for load

Siskiyou County, California · 0.04 MI North of SR 96 · Structure no. 02C0008

Built
1930
95 years old
Condition
Poor
inspected July 2024
Type
Suspension
Steel
Length
288 ft
1 main span
Daily traffic
21
2011 count
Owner
County
County Highway Agency

About this bridge

Horse Creek RD over Klamath River is a steel suspension carrying Horse Creek RD over Klamath River in Siskiyou County, California. It was built in 1930, so it is 95 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 21 vehicles a day, roughly 5% of them trucks, projected to reach 34 by 2041. The structure is 288 ft (87.8 m) long and 13 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesHorse Creek RD
CrossesKlamath River
Location0.04 MI North of SR 96
RouteCounty Highway 0
Coordinates41.82443, -122.99752
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating11 US tons
Inventory rating8.3 US tons

Structure

Structure typeSuspension
MaterialSteel
DeckWood or timber
Main spans1 (+5 approach)
Design loadUnknown
Structure length288 ft (87.8 m)
Longest span200 ft (61 m)
Deck width13 ft (4 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic21 (2011)
Projected traffic34 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Horse Creek RD over Klamath River built?

It was built in 1930, making it 95 years old in 2025.

What condition is Horse Creek RD over Klamath River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Horse Creek RD over Klamath River carry?

About 21 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Horse Creek RD over Klamath River?

The structure is 288 ft (87.8 m) long with a longest span of 200 ft (61 m) and a deck 13 ft wide.

Who owns Horse Creek RD over Klamath River?

It is owned by the County Highway Agency.