US Bridges

Skaggs Springs RD over Warm Springs Creek

Fair

Sonoma County, California · 10.9 MI W JCT Rckple RD · Structure no. 20C0439

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
604 ft
3 main spans
Daily traffic
400
2015 count
Owner
County
County Highway Agency

About this bridge

Skaggs Springs RD over Warm Springs Creek is a prestressed concrete continuous box beam or girders - multiple carrying Skaggs Springs RD over Warm Springs Creek in Sonoma County, California. It was built in 1978, so it is 47 years old, younger 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 400 vehicles a day, roughly 3% of them trucks, projected to reach 1,048 by 2040. The structure is 604 ft (184.1 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSkaggs Springs RD
CrossesWarm Springs Creek
Location10.9 MI W JCT Rckple RD
RouteCounty Highway 0
Coordinates38.6713, -123.10037
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.1 US tons
Inventory rating26.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length604 ft (184.1 m)
Longest span234 ft (71.3 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2015)
Projected traffic1,048 by 2040
Trucks3%
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

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 Skaggs Springs RD over Warm Springs Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Skaggs Springs RD over Warm Springs 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 July 2023.

How much traffic does Skaggs Springs RD over Warm Springs Creek carry?

About 400 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Skaggs Springs RD over Warm Springs Creek?

The structure is 604 ft (184.1 m) long with a longest span of 234 ft (71.3 m) and a deck 34 ft wide.

Who owns Skaggs Springs RD over Warm Springs Creek?

It is owned by the County Highway Agency.