US Bridges

Todd RD over Laguna De Santa Rosa

Fair

Sonoma County, California · 0.6 MI N JCT W/Sr 116 · Structure no. 20C0200

Built
1973
52 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
152 ft
5 main spans
Daily traffic
2,434
2015 count
Owner
County
County Highway Agency

About this bridge

Todd RD over Laguna De Santa Rosa is a concrete continuous slab carrying Todd RD over Laguna De Santa Rosa in Sonoma County, California. It was built in 1973, so it is 52 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 2,434 vehicles a day, roughly 3% of them trucks, projected to reach 2,650 by 2040. The structure is 152 ft (46.3 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTodd RD
CrossesLaguna De Santa Rosa
Location0.6 MI N JCT W/Sr 116
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.37523, -122.77963
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,434 (2015)
Projected traffic2,650 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Todd RD over Laguna De Santa Rosa built?

It was built in 1973, making it 52 years old in 2025.

What condition is Todd RD over Laguna De Santa Rosa 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 May 2023.

How much traffic does Todd RD over Laguna De Santa Rosa carry?

About 2,434 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Todd RD over Laguna De Santa Rosa?

The structure is 152 ft (46.3 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns Todd RD over Laguna De Santa Rosa?

It is owned by the County Highway Agency.