US Bridges

N101-MAIN ST Off over Bradley Channel

Fair

Santa Barbara County, California · 05-SB-101-88.54-SMRA · Structure no. 51 0309S

Built
1997
28 years old
Condition
Fair
inspected December 2022
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
14,500
2009 count
Owner
State
State Highway Agency

About this bridge

N101-MAIN ST Off over Bradley Channel is a concrete continuous culvert carrying N101-MAIN ST Off over Bradley Channel in Santa Barbara County, California. It was built in 1997, so it is 28 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 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 14,500 vehicles a day, roughly 6% of them trucks, projected to reach 26,379 by 2044. The structure is 22 ft (6.6 m) long and 118 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesN101-MAIN ST Off
CrossesBradley Channel
Location05-SB-101-88.54-SMRA
RouteU.S. Route 101
CountySanta Barbara County
StateCalifornia
Coordinates34.95143, -120.41676
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length22 ft (6.6 m)
Longest span10 ft (3 m)
Deck width118 ft (36 m)
Roadway width115 ft (35.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2009)
Projected traffic26,379 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 N101-MAIN ST Off over Bradley Channel built?

It was built in 1997, making it 28 years old in 2025.

What condition is N101-MAIN ST Off over Bradley Channel 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 December 2022.

How much traffic does N101-MAIN ST Off over Bradley Channel carry?

About 14,500 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is N101-MAIN ST Off over Bradley Channel?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m) and a deck 118 ft wide.

Who owns N101-MAIN ST Off over Bradley Channel?

It is owned by the State Highway Agency.