US Bridges

U.S. Highway 101 over SR 271 (@ Pm 3.38)

Fair

Mendocino County, California · 01-MEN-101-R87.67 · Structure no. 10 0145

Built
1967
58 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
53 ft
1 main span
Daily traffic
6,150
2009 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over SR 271 (@ Pm 3.38) is a concrete box beam or girders - multiple carrying U.S. Highway 101 over SR 271 (@ Pm 3.38) in Mendocino County, California. It was built in 1967, so it is 58 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 6,150 vehicles a day, roughly 16% of them trucks, projected to reach 8,263 by 2042. The structure is 53 ft (16.2 m) long and 180 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesU.S. Highway 101
CrossesSR 271 (@ Pm 3.38)
Location01-MEN-101-R87.67
RouteU.S. Route 101
CountyMendocino County
StateCalifornia
Coordinates39.83316, -123.67822
Functional classRural Principal Arterial - Other

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.
Last inspectionApril 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span43 ft (13.1 m)
Deck width180 ft (55 m)
Roadway width80 ft (24.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,150 (2009)
Projected traffic8,263 by 2042
Trucks16%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed34.2 mi (55 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 U.S. Highway 101 over SR 271 (@ Pm 3.38) built?

It was built in 1967, making it 58 years old in 2025.

What condition is U.S. Highway 101 over SR 271 (@ Pm 3.38) 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 April 2024.

How much traffic does U.S. Highway 101 over SR 271 (@ Pm 3.38) carry?

About 6,150 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is U.S. Highway 101 over SR 271 (@ Pm 3.38)?

The structure is 53 ft (16.2 m) long with a longest span of 43 ft (13.1 m) and a deck 180 ft wide.

Who owns U.S. Highway 101 over SR 271 (@ Pm 3.38)?

It is owned by the State Highway Agency.