US Bridges

Skellenger Lane over Conn Creek

Fair

Napa County, California · 0.7 MI W Silverado Trail · Structure no. 21C0087

Built
1930
95 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
84 ft
3 main spans
Daily traffic
306
2012 count
Owner
County
County Highway Agency

About this bridge

Skellenger Lane over Conn Creek is a concrete continuous tee beam carrying Skellenger Lane over Conn Creek in Napa County, California. It was built in 1930, so it is 95 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 306 vehicles a day, roughly 10% of them trucks, projected to reach 546 by 2046. The structure is 84 ft (25.6 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSkellenger Lane
CrossesConn Creek
Location0.7 MI W Silverado Trail
RouteCounty Highway 0
CountyNapa County
StateCalifornia
Coordinates38.45899, -122.38852
Functional classRural Minor Arterial

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.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.3 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length84 ft (25.6 m)
Longest span27 ft (8.2 m)
Deck width21 ft (6.3 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic306 (2012)
Projected traffic546 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Skellenger Lane over Conn Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Skellenger Lane over Conn 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 May 2024.

How much traffic does Skellenger Lane over Conn Creek carry?

About 306 vehicles per day (2012 count), of which roughly 10% are trucks.

How long is Skellenger Lane over Conn Creek?

The structure is 84 ft (25.6 m) long with a longest span of 27 ft (8.2 m) and a deck 21 ft wide.

Who owns Skellenger Lane over Conn Creek?

It is owned by the County Highway Agency.