US Bridges

U.S. Highway 101 over SR 128 (mccray Road)

Fair

Sonoma County, California · 04-SON-101-R54.21 · Structure no. 20 0262

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
176 ft
1 main span
Daily traffic
10,200
2015 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over SR 128 (mccray Road) is a prestressed concrete box beam or girders - multiple carrying U.S. Highway 101 over SR 128 (mccray Road) in Sonoma County, California. It was built in 1989, so it is 36 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 10,200 vehicles a day, roughly 12% of them trucks, projected to reach 39,524 by 2041. The structure is 176 ft (53.5 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesU.S. Highway 101
CrossesSR 128 (mccray Road)
Location04-SON-101-R54.21
RouteU.S. Route 101
CountySonoma County
StateCalifornia
Coordinates38.82803, -123.01422
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length176 ft (53.5 m)
Longest span170 ft (51.9 m)
Deck width79 ft (24.2 m)
Roadway width74 ft (22.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,200 (2015)
Projected traffic39,524 by 2041
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 128 (mccray Road) built?

It was built in 1989, making it 36 years old in 2025.

What condition is U.S. Highway 101 over SR 128 (mccray Road) 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 May 2023.

How much traffic does U.S. Highway 101 over SR 128 (mccray Road) carry?

About 10,200 vehicles per day (2015 count), of which roughly 12% are trucks.

How long is U.S. Highway 101 over SR 128 (mccray Road)?

The structure is 176 ft (53.5 m) long with a longest span of 170 ft (51.9 m) and a deck 79 ft wide.

Who owns U.S. Highway 101 over SR 128 (mccray Road)?

It is owned by the State Highway Agency.