US Bridges

State Route 29 NB over Cfnr & Paoli Loop Road

Good

Napa County, California · 04-NAP-029-R2.37 · Structure no. 21 0043R

Built
1979
46 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
214 ft
4 main spans
Daily traffic
22,625
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 29 NB over Cfnr & Paoli Loop Road is a concrete continuous box beam or girders - multiple carrying State Route 29 NB over Cfnr & Paoli Loop Road in Napa County, California. It was built in 1979, so it is 46 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,625 vehicles a day, roughly 2% of them trucks, projected to reach 67,781 by 2042. The structure is 214 ft (65.2 m) long and 42 ft wide.

CarriesState Route 29 NB
CrossesCfnr & Paoli Loop Road
Location04-NAP-029-R2.37
RouteState Highway 29
Coordinates38.18906, -122.25525
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length214 ft (65.2 m)
Longest span77 ft (23.5 m)
Deck width42 ft (12.7 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,625 (2009)
Projected traffic67,781 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemYes

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 State Route 29 NB over Cfnr & Paoli Loop Road built?

It was built in 1979, making it 46 years old in 2025.

What condition is State Route 29 NB over Cfnr & Paoli Loop Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does State Route 29 NB over Cfnr & Paoli Loop Road carry?

About 22,625 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is State Route 29 NB over Cfnr & Paoli Loop Road?

The structure is 214 ft (65.2 m) long with a longest span of 77 ft (23.5 m) and a deck 42 ft wide.

Who owns State Route 29 NB over Cfnr & Paoli Loop Road?

It is owned by the State Highway Agency.