US Bridges

Williams Avenue over High Line Wasteway

Fair

Merced County, California · 1.6 MI E Griffith Ave · Structure no. 39C0126

Built
1935
90 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
400
1980 count
Owner
County
County Highway Agency

About this bridge

Williams Avenue over High Line Wasteway is a concrete continuous slab carrying Williams Avenue over High Line Wasteway in Merced County, California. It was built in 1935, so it is 90 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 400 vehicles a day, roughly 15% of them trucks, projected to reach 657 by 2042. The structure is 22 ft (6.7 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWilliams Avenue
CrossesHigh Line Wasteway
Location1.6 MI E Griffith Ave
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.38977, -120.806
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.1 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1980)
Projected traffic657 by 2042
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Williams Avenue over High Line Wasteway built?

It was built in 1935, making it 90 years old in 2025.

What condition is Williams Avenue over High Line Wasteway 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 January 2024.

How much traffic does Williams Avenue over High Line Wasteway carry?

About 400 vehicles per day (1980 count), of which roughly 15% are trucks.

How long is Williams Avenue over High Line Wasteway?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.1 m) and a deck 16 ft wide.

Who owns Williams Avenue over High Line Wasteway?

It is owned by the County Highway Agency.