US Bridges

Shanks Road over State Route 99

Good

Merced County, California · 10-MER-099-R34.43 · Structure no. 39 0196

Built
1980
45 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
251 ft
2 main spans
Daily traffic
5,000
2015 count
Owner
State
State Highway Agency

About this bridge

Shanks Road over State Route 99 is a prestressed concrete continuous box beam or girders - multiple carrying Shanks Road over State Route 99 in Merced County, California. It was built in 1980, so it is 45 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 3% of them trucks, projected to reach 6,764 by 2046. The structure is 251 ft (76.5 m) long and 67 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesShanks Road
CrossesState Route 99
Location10-MER-099-R34.43
RouteCounty Highway 0
Coordinates37.43681, -120.78364
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length251 ft (76.5 m)
Longest span130 ft (39.6 m)
Deck width67 ft (20.4 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2015)
Projected traffic6,764 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Shanks Road over State Route 99 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Shanks Road over State Route 99 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Shanks Road over State Route 99 carry?

About 5,000 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Shanks Road over State Route 99?

The structure is 251 ft (76.5 m) long with a longest span of 130 ft (39.6 m) and a deck 67 ft wide.

Who owns Shanks Road over State Route 99?

It is owned by the State Highway Agency.