US Bridges

Pierson ST over Santa Rosa Creek

Fair

Sonoma County, California · 0.2 MI N/O West 3rd ST · Structure no. 20C0420

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
500
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pierson ST over Santa Rosa Creek is a concrete continuous slab carrying Pierson ST over Santa Rosa 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 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 313 by 2045. The structure is 101 ft (30.8 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPierson ST
CrossesSanta Rosa Creek
Location0.2 MI N/O West 3rd ST
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.43671, -122.72449
Functional classUrban Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating70.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length101 ft (30.8 m)
Longest span35 ft (10.7 m)
Deck width36 ft (10.9 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2019)
Projected traffic313 by 2045
Trucks1%
Lanes on structure2
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 Pierson ST over Santa Rosa Creek built?

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

What condition is Pierson ST over Santa Rosa 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 June 2024.

How much traffic does Pierson ST over Santa Rosa Creek carry?

About 500 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Pierson ST over Santa Rosa Creek?

The structure is 101 ft (30.8 m) long with a longest span of 35 ft (10.7 m) and a deck 36 ft wide.

Who owns Pierson ST over Santa Rosa Creek?

It is owned by the City or Municipal Highway Agency.