US Bridges

Windsor Road over Pool Creek

Poor

Sonoma County, California · 0.2 MI N of Shiloh RD · Structure no. 20C0337

Built
1967
58 years old
Condition
Poor
inspected May 2023
Type
Slab
Concrete Continuous
Length
87 ft
3 main spans
Daily traffic
5,900
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Windsor Road over Pool Creek is a concrete continuous slab carrying Windsor Road over Pool Creek in Sonoma County, California. It was built in 1967, so it is 58 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 5,900 vehicles a day, roughly 2% of them trucks, projected to reach 8,066 by 2045. The structure is 87 ft (26.5 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWindsor Road
CrossesPool Creek
Location0.2 MI N of Shiloh RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.52693, -122.81672
Functional classUrban Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span34 ft (10.4 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2011)
Projected traffic8,066 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$544,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Windsor Road over Pool Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Windsor Road over Pool 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 May 2023.

How much traffic does Windsor Road over Pool Creek carry?

About 5,900 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Windsor Road over Pool Creek?

The structure is 87 ft (26.5 m) long with a longest span of 34 ft (10.4 m) and a deck 41 ft wide.

Who owns Windsor Road over Pool Creek?

It is owned by the Town or Township Highway Agency.