US Bridges

Brookwood Road over Santa Rosa Creek

Good

Sonoma County, California · 0.6 MI N of RTE 12 · Structure no. 20C0486

Built
1979
46 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
150 ft
4 main spans
Daily traffic
11,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Brookwood Road over Santa Rosa Creek is a concrete continuous slab carrying Brookwood Road over Santa Rosa Creek in Sonoma County, California. It was built in 1979, so it is 46 years old, younger 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 11,000 vehicles a day, roughly 2% of them trucks, projected to reach 18,232 by 2046. The structure is 150 ft (45.7 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBrookwood Road
CrossesSanta Rosa Creek
Location0.6 MI N of RTE 12
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.44123, -122.7033
Functional classUrban Minor Arterial

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.2 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span30 ft (9.1 m)
Deck width77 ft (23.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2010)
Projected traffic18,232 by 2046
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Brookwood Road over Santa Rosa Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Brookwood Road over Santa Rosa 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 August 2024.

How much traffic does Brookwood Road over Santa Rosa Creek carry?

About 11,000 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Brookwood Road over Santa Rosa Creek?

The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 77 ft wide.

Who owns Brookwood Road over Santa Rosa Creek?

It is owned by the City or Municipal Highway Agency.