US Bridges

Gorgas Offrmp 101S over Tennessee Hollow

Fair

San Francisco County, California · 04-SF-101-R8.47-SF · Structure no. 34 0168K

Built
2015
10 years old
Condition
Fair
inspected March 2023
Type
Slab
Prestressed Concrete Continuous
Length
160 ft
3 main spans
Daily traffic
20,000
2015 count
Owner
State
State Highway Agency

About this bridge

Gorgas Offrmp 101S over Tennessee Hollow is a prestressed concrete continuous slab carrying Gorgas Offrmp 101S over Tennessee Hollow in San Francisco County, California. It was built in 2015, so it is 10 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 20,000 vehicles a day, roughly 4% of them trucks, projected to reach 25,061 by 2045. The structure is 160 ft (48.7 m) long and 37 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesGorgas Offrmp 101S
CrossesTennessee Hollow
Location04-SF-101-R8.47-SF
RouteU.S. Route 101
CountySan Francisco County
StateCalifornia
Coordinates37.80288, -122.45319
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length160 ft (48.7 m)
Longest span65 ft (19.8 m)
Deck width37 ft (11.2 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2015)
Projected traffic25,061 by 2045
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 Gorgas Offrmp 101S over Tennessee Hollow built?

It was built in 2015, making it 10 years old in 2025.

What condition is Gorgas Offrmp 101S over Tennessee Hollow 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 Gorgas Offrmp 101S over Tennessee Hollow carry?

About 20,000 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is Gorgas Offrmp 101S over Tennessee Hollow?

The structure is 160 ft (48.7 m) long with a longest span of 65 ft (19.8 m) and a deck 37 ft wide.

Who owns Gorgas Offrmp 101S over Tennessee Hollow?

It is owned by the State Highway Agency.