US Bridges

Pentz Road over State Route 99

Fair

Butte County, California · 03-BUT-099-23.86 · Structure no. 12 0190

Built
1975
50 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
234 ft
2 main spans
Daily traffic
2,805
2020 count
Owner
State
State Highway Agency

About this bridge

Pentz Road over State Route 99 is a prestressed concrete continuous box beam or girders - multiple carrying Pentz Road over State Route 99 in Butte County, California. It was built in 1975, so it is 50 years old, younger 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 2,805 vehicles a day, roughly 1% of them trucks, projected to reach 5,498 by 2041. The structure is 234 ft (71.3 m) long and 44 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesPentz Road
CrossesState Route 99
Location03-BUT-099-23.86
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.64221, -121.71653
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length234 ft (71.3 m)
Longest span116 ft (35.4 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,805 (2020)
Projected traffic5,498 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

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 Pentz Road over State Route 99 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Pentz Road over State Route 99 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 Pentz Road over State Route 99 carry?

About 2,805 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Pentz Road over State Route 99?

The structure is 234 ft (71.3 m) long with a longest span of 116 ft (35.4 m) and a deck 44 ft wide.

Who owns Pentz Road over State Route 99?

It is owned by the State Highway Agency.