US Bridges

Pennington RD over Unknown Drain

Fair

Butte County, California · 0.2 MI N/O Sutter CO Line · Structure no. 12C0388

Built
1940
85 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
26 ft
2 main spans
Daily traffic
190
2019 count
Owner
County
County Highway Agency

About this bridge

Pennington RD over Unknown Drain is a steel continuous stringer/multi-beam or girder carrying Pennington RD over Unknown Drain in Butte County, California. It was built in 1940, so it is 85 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 6 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 190 vehicles a day, roughly 4% of them trucks, projected to reach 427 by 2044. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesPennington RD
CrossesUnknown Drain
Location0.2 MI N/O Sutter CO Line
RouteCounty Highway 0
Coordinates39.30629, -121.79838
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 rating28.9 US tons
Inventory rating17.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span12 ft (3.8 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2019)
Projected traffic427 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Pennington RD over Unknown Drain built?

It was built in 1940, making it 85 years old in 2025.

What condition is Pennington RD over Unknown Drain 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 January 2025.

How much traffic does Pennington RD over Unknown Drain carry?

About 190 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Pennington RD over Unknown Drain?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.8 m) and a deck 28 ft wide.

Who owns Pennington RD over Unknown Drain?

It is owned by the County Highway Agency.