US Bridges

Limerick Lane over US Highway 101

Fair

Sonoma County, California · 04-SON-101-32.79 · Structure no. 20 0066

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
186 ft
2 main spans
Daily traffic
1,800
2015 count
Owner
State
State Highway Agency

About this bridge

Limerick Lane over US Highway 101 is a concrete continuous box beam or girders - multiple carrying Limerick Lane over US Highway 101 in Sonoma County, California. It was built in 1962, so it is 63 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 1,800 vehicles a day, roughly 2% of them trucks, projected to reach 6,391 by 2045. The structure is 186 ft (56.7 m) long and 40 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLimerick Lane
CrossesUS Highway 101
Location04-SON-101-32.79
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.58747, -122.84422
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.3 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span90 ft (27.4 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2015)
Projected traffic6,391 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Limerick Lane over US Highway 101 built?

It was built in 1962, making it 63 years old in 2025.

What condition is Limerick Lane over US Highway 101 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 April 2023.

How much traffic does Limerick Lane over US Highway 101 carry?

About 1,800 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Limerick Lane over US Highway 101?

The structure is 186 ft (56.7 m) long with a longest span of 90 ft (27.4 m) and a deck 40 ft wide.

Who owns Limerick Lane over US Highway 101?

It is owned by the State Highway Agency.