US Bridges

State Route 99 SB over Canal Creek

Fair

Merced County, California · 10-MER-099-20.17 · Structure no. 39 0252L

Built
2015
10 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
19,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 99 SB over Canal Creek is a prestressed concrete box beam or girders - multiple carrying State Route 99 SB 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 19,500 vehicles a day, roughly 18% of them trucks, projected to reach 32,109 by 2046. The structure is 90 ft (27.4 m) long and 61 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 99 SB
CrossesCanal Creek
Location10-MER-099-20.17
RouteState Highway 99
Coordinates37.33263, -120.56979
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable 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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span83 ft (25.4 m)
Deck width61 ft (18.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,500 (2009)
Projected traffic32,109 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 State Route 99 SB over Canal Creek built?

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

What condition is State Route 99 SB 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 State Route 99 SB over Canal Creek carry?

About 19,500 vehicles per day (2009 count), of which roughly 18% are trucks.

How long is State Route 99 SB over Canal Creek?

The structure is 90 ft (27.4 m) long with a longest span of 83 ft (25.4 m) and a deck 61 ft wide.

Who owns State Route 99 SB over Canal Creek?

It is owned by the State Highway Agency.