US Bridges

Scott River Road over Moffett Creek

Good

Siskiyou County, California · 0.3 MI N State Route 3 · Structure no. 02C0120

Built
1962
63 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
122 ft
4 main spans
Daily traffic
1,032
2011 count
Owner
County
County Highway Agency

About this bridge

Scott River Road over Moffett Creek is a concrete continuous slab carrying Scott River Road over Moffett Creek in Siskiyou County, California. It was built in 1962, so it is 63 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,032 vehicles a day, roughly 10% of them trucks, projected to reach 1,422 by 2042. The structure is 122 ft (37.3 m) long and 31 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesScott River Road
CrossesMoffett Creek
Location0.3 MI N State Route 3
RouteCounty Highway 0
Coordinates41.60533, -122.85125
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating61.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length122 ft (37.3 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,032 (2011)
Projected traffic1,422 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 Road over Moffett Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Scott River Road over Moffett Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Scott River Road over Moffett Creek carry?

About 1,032 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Scott River Road over Moffett Creek?

The structure is 122 ft (37.3 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Scott River Road over Moffett Creek?

It is owned by the County Highway Agency.