US Bridges

Lone Pine RD over Blucher Creek

Fair

Sonoma County, California · 0.3 MI W of S.H. 116 · Structure no. 20C0285

Built
1958
67 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
63 ft
3 main spans
Daily traffic
1,950
2018 count
Owner
County
County Highway Agency

About this bridge

Lone Pine RD over Blucher Creek is a concrete continuous slab carrying Lone Pine RD over Blucher Creek in Sonoma County, California. It was built in 1958, so it is 67 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 1,950 vehicles a day, roughly 1% of them trucks, projected to reach 2,289 by 2047. The structure is 63 ft (19.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLone Pine RD
CrossesBlucher Creek
Location0.3 MI W of S.H. 116
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.36496, -122.78672
Functional classUrban 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
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2025
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.1 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2018)
Projected traffic2,289 by 2047
Trucks1%
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

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 Lone Pine RD over Blucher Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Lone Pine RD over Blucher 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 February 2025.

How much traffic does Lone Pine RD over Blucher Creek carry?

About 1,950 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Lone Pine RD over Blucher Creek?

The structure is 63 ft (19.2 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Lone Pine RD over Blucher Creek?

It is owned by the County Highway Agency.