US Bridges

US Highway 101 SB over RTE 1 Rmps Crissy Cowles

Fair

San Francisco County, California · 04-SF-101-R9.35-SF · Structure no. 34 0157L

Built
2012
13 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
1,340 ft
6 main spans
Daily traffic
39,500
2019 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 SB over RTE 1 Rmps Crissy Cowles is a prestressed concrete continuous box beam or girders - single or spread carrying US Highway 101 SB over RTE 1 Rmps Crissy Cowles in San Francisco County, California. It was built in 2012, so it is 13 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 39,500 vehicles a day, roughly 1% of them trucks, projected to reach 54,222 by 2041. The structure is 1,340 ft (408.4 m) long and 79 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesUS Highway 101 SB
CrossesRTE 1 Rmps Crissy Cowles
Location04-SF-101-R9.35-SF
RouteU.S. Route 101
Coordinates37.80203, -122.46527
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length1,340 ft (408.4 m)
Longest span275 ft (83.8 m)
Deck width79 ft (24.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,500 (2019)
Projected traffic54,222 by 2041
Trucks1%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5.6 mi (9 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 US Highway 101 SB over RTE 1 Rmps Crissy Cowles built?

It was built in 2012, making it 13 years old in 2025.

What condition is US Highway 101 SB over RTE 1 Rmps Crissy Cowles 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 March 2023.

How much traffic does US Highway 101 SB over RTE 1 Rmps Crissy Cowles carry?

About 39,500 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is US Highway 101 SB over RTE 1 Rmps Crissy Cowles?

The structure is 1,340 ft (408.4 m) long with a longest span of 275 ft (83.8 m) and a deck 79 ft wide.

Who owns US Highway 101 SB over RTE 1 Rmps Crissy Cowles?

It is owned by the State Highway Agency.