US Bridges

CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps

Fair

Ventura County, California · 07-VEN-101-30.10-VEN · Structure no. 52 0217K

Built
1961
64 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
884 ft
12 main spans
Daily traffic
12,706
2018 count
Owner
State
State Highway Agency

About this bridge

CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps is a concrete continuous box beam or girders - multiple carrying CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps in Ventura County, California. It was built in 1961, so it is 64 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 12,706 vehicles a day, roughly 2% of them trucks, projected to reach 18,932 by 2046. The structure is 884 ft (269.4 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCHESTNUT-S101 Onrp
CrossesUP RR AMTRAK US 101 Rmps
Location07-VEN-101-30.10-VEN
RouteU.S. Route 101
CountyVentura County
StateCalifornia
Coordinates34.27653, -119.29058
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment9: Superior to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length884 ft (269.4 m)
Longest span86 ft (26.2 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,706 (2018)
Projected traffic18,932 by 2046
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps built?

It was built in 1961, making it 64 years old in 2025.

What condition is CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps 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 August 2024.

How much traffic does CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps carry?

About 12,706 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps?

The structure is 884 ft (269.4 m) long with a longest span of 86 ft (26.2 m) and a deck 34 ft wide.

Who owns CHESTNUT-S101 Onrp over UP RR AMTRAK US 101 Rmps?

It is owned by the State Highway Agency.