US Bridges

Scott River RD over Middle Creek

Fair

Siskiyou County, California · 1.4 MI N Kelsey Creek RD · Structure no. 02C0038

Built
1900
125 years old, rebuilt 1997
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
135
2011 count
Owner
County
County Highway Agency

About this bridge

Scott River RD over Middle Creek is a steel stringer/multi-beam or girder carrying Scott River RD over Middle Creek in Siskiyou County, California. It was built in 1900 and reconstructed in 1997, so it is 125 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 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 135 vehicles a day, roughly 10% of them trucks, projected to reach 189 by 2046. The structure is 24 ft (7.3 m) long and 17 ft wide. If it were closed, the detour would be 85.1 mi (137 km).

CarriesScott River RD
CrossesMiddle Creek
Location1.4 MI N Kelsey Creek RD
RouteCounty Highway 0
Coordinates41.66808, -123.10958
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width17 ft (5.1 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135 (2011)
Projected traffic189 by 2046
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed85.1 mi (137 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 Scott River RD over Middle Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1997.

What condition is Scott River RD over Middle 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 August 2024.

How much traffic does Scott River RD over Middle Creek carry?

About 135 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Scott River RD over Middle Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 17 ft wide.

Who owns Scott River RD over Middle Creek?

It is owned by the County Highway Agency.