US Bridges

Knoxv-Berryessa RD over Pope Crk.(lake Berryessa

Poor

Napa County, California · .2 MI S/O Pope Canyon RD · Structure no. 21C0013

Built
1957
68 years old, rebuilt 1958
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
703 ft
4 main spans
Daily traffic
3,570
2005 count
Owner
County
County Highway Agency

About this bridge

Knoxv-Berryessa RD over Pope Crk.(lake Berryessa is a steel stringer/multi-beam or girder carrying Knoxv-Berryessa RD over Pope Crk.(lake Berryessa in Napa County, California. It was built in 1957 and reconstructed in 1958, so it is 68 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,570 vehicles a day, roughly 10% of them trucks, projected to reach 5,509 by 2040. The structure is 703 ft (214.4 m) long and 30 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesKnoxv-Berryessa RD
CrossesPope Crk.(lake Berryessa
Location.2 MI S/O Pope Canyon RD
RouteCounty Highway 0
CountyNapa County
StateCalifornia
Coordinates38.61582, -122.28942
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+3 approach)
Design loadHS 20
Structure length703 ft (214.4 m)
Longest span166 ft (50.6 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,570 (2005)
Projected traffic5,509 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.3 million (2017 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Knoxv-Berryessa RD over Pope Crk.(lake Berryessa built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1958.

What condition is Knoxv-Berryessa RD over Pope Crk.(lake Berryessa in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Knoxv-Berryessa RD over Pope Crk.(lake Berryessa carry?

About 3,570 vehicles per day (2005 count), of which roughly 10% are trucks.

How long is Knoxv-Berryessa RD over Pope Crk.(lake Berryessa?

The structure is 703 ft (214.4 m) long with a longest span of 166 ft (50.6 m) and a deck 30 ft wide.

Who owns Knoxv-Berryessa RD over Pope Crk.(lake Berryessa?

It is owned by the County Highway Agency.