US Bridges

State Route 96 over Dillon Creek

Fair

Siskiyou County, California · 02-SIS-096-R16.13 · Structure no. 02 0035

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
251 ft
2 main spans
Daily traffic
330
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 96 over Dillon Creek is a steel continuous stringer/multi-beam or girder carrying State Route 96 over Dillon Creek in Siskiyou County, California. It was built in 1966, so it is 59 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 330 vehicles a day, roughly 2% of them trucks, projected to reach 418 by 2042. The structure is 251 ft (76.5 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 96
CrossesDillon Creek
Location02-SIS-096-R16.13
RouteState Highway 96
CountySiskiyou County
StateCalifornia
Coordinates41.57525, -123.53991
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length251 ft (76.5 m)
Longest span125 ft (38.1 m)
Deck width35 ft (10.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2009)
Projected traffic418 by 2042
Trucks2%
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

OwnerState Highway Agency
Maintained byState 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 State Route 96 over Dillon Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is State Route 96 over Dillon 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 2024.

How much traffic does State Route 96 over Dillon Creek carry?

About 330 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is State Route 96 over Dillon Creek?

The structure is 251 ft (76.5 m) long with a longest span of 125 ft (38.1 m) and a deck 35 ft wide.

Who owns State Route 96 over Dillon Creek?

It is owned by the State Highway Agency.