US Bridges

Seavey RD over No Name Creek

Poor

Sonoma County, California · 0.4 MI W Spring Hill RD · Structure no. 20C0292

Built
1960
65 years old
Condition
Poor
inspected February 2025
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
200
2011 count
Owner
County
County Highway Agency

About this bridge

Seavey RD over No Name Creek is a concrete continuous culvert carrying Seavey RD over No Name Creek in Sonoma County, California. It was built in 1960, so it is 65 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.

It carries about 200 vehicles a day, roughly 2% of them trucks, projected to reach 243 by 2043. The structure is 26 ft (8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSeavey RD
CrossesNo Name Creek
Location0.4 MI W Spring Hill RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.24263, -122.77781
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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2025
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (8 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2011)
Projected traffic243 by 2043
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$95,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Seavey RD over No Name Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Seavey RD over No Name Creek 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 February 2025.

How much traffic does Seavey RD over No Name Creek carry?

About 200 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Seavey RD over No Name Creek?

The structure is 26 ft (8 m) long with a longest span of 11 ft (3.3 m).

Who owns Seavey RD over No Name Creek?

It is owned by the County Highway Agency.