US Bridges

Pacific Heights RD over Dredger Gulch

Fair

Butte County, California · 1.0 MI N Welsh RD · Structure no. 12C0117

Built
1922
103 years old, rebuilt 1930
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
230
2019 count
Owner
County
County Highway Agency

About this bridge

Pacific Heights RD over Dredger Gulch is a concrete continuous slab carrying Pacific Heights RD over Dredger Gulch in Butte County, California. It was built in 1922 and reconstructed in 1930, so it is 103 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 230 vehicles a day, roughly 13% of them trucks, projected to reach 267 by 2041. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPacific Heights RD
CrossesDredger Gulch
Location1.0 MI N Welsh RD
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.44692, -121.60607
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating15.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span13 ft (4 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2019)
Projected traffic267 by 2041
Trucks13%
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 Pacific Heights RD over Dredger Gulch built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1930.

What condition is Pacific Heights RD over Dredger Gulch 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 2023.

How much traffic does Pacific Heights RD over Dredger Gulch carry?

About 230 vehicles per day (2019 count), of which roughly 13% are trucks.

How long is Pacific Heights RD over Dredger Gulch?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (4 m) and a deck 28 ft wide.

Who owns Pacific Heights RD over Dredger Gulch?

It is owned by the County Highway Agency.