US Bridges

Marino Way over Duck Slough Overflow

Good

Merced County, California · 0.5 MI NW of Mariposa Wy · Structure no. 39C0377

Built
2015
10 years old
Condition
Good
inspected October 2022
Type
Slab
Concrete Continuous
Length
160 ft
4 main spans
Daily traffic
1,000
2015 count
Owner
County
County Highway Agency

About this bridge

Marino Way over Duck Slough Overflow is a concrete continuous slab carrying Marino Way over Duck Slough Overflow 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 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 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,331 by 2040. The structure is 160 ft (48.8 m) long and 43 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesMarino Way
CrossesDuck Slough Overflow
Location0.5 MI NW of Mariposa Wy
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.25514, -120.41522
Functional classRural Minor Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length160 ft (48.8 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2015)
Projected traffic1,331 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Marino Way over Duck Slough Overflow built?

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

What condition is Marino Way over Duck Slough Overflow 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 October 2022.

How much traffic does Marino Way over Duck Slough Overflow carry?

About 1,000 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Marino Way over Duck Slough Overflow?

The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns Marino Way over Duck Slough Overflow?

It is owned by the County Highway Agency.