US Bridges

ST RTE 99NB Onramp over Canal Creek

Fair

Merced County, California · 10-MER-099-R20.21 · Structure no. 39 0253S

Built
2015
10 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
78 ft
1 main span
Daily traffic
10,000
2015 count
Owner
State
State Highway Agency

About this bridge

ST RTE 99NB Onramp over Canal Creek is a concrete box beam or girders - multiple carrying ST RTE 99NB Onramp over Canal Creek in Merced 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 10,000 vehicles a day, roughly 18% of them trucks, projected to reach 13,575 by 2046. The structure is 78 ft (23.8 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST RTE 99NB Onramp
CrossesCanal Creek
Location10-MER-099-R20.21
RouteState Highway 99
CountyMerced County
StateCalifornia
Coordinates37.33331, -120.57037
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length78 ft (23.8 m)
Longest span73 ft (22.2 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2015)
Projected traffic13,575 by 2046
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 ST RTE 99NB Onramp over Canal Creek built?

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

What condition is ST RTE 99NB Onramp over Canal Creek 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 ST RTE 99NB Onramp over Canal Creek carry?

About 10,000 vehicles per day (2015 count), of which roughly 18% are trucks.

How long is ST RTE 99NB Onramp over Canal Creek?

The structure is 78 ft (23.8 m) long with a longest span of 73 ft (22.2 m) and a deck 35 ft wide.

Who owns ST RTE 99NB Onramp over Canal Creek?

It is owned by the State Highway Agency.