US Bridges

Gurr Road over Duck Slough

Poor

Merced County, California · 1.3 MI N Sandy Mush Road · Structure no. 39C0298

Built
1975
50 years old
Condition
Poor
inspected January 2024
Type
Slab
Concrete Continuous
Length
72 ft
3 main spans
Daily traffic
500
2005 count
Owner
County
County Highway Agency

About this bridge

Gurr Road over Duck Slough is a concrete continuous slab carrying Gurr Road over Duck Slough in Merced County, California. It was built in 1975, so it is 50 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 500 vehicles a day, roughly 5% of them trucks, projected to reach 838 by 2046. The structure is 72 ft (21.9 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesGurr Road
CrossesDuck Slough
Location1.3 MI N Sandy Mush Road
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.21415, -120.56055
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length72 ft (21.9 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2005)
Projected traffic838 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$364,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gurr Road over Duck Slough built?

It was built in 1975, making it 50 years old in 2025.

What condition is Gurr Road over Duck Slough in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does Gurr Road over Duck Slough carry?

About 500 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Gurr Road over Duck Slough?

The structure is 72 ft (21.9 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns Gurr Road over Duck Slough?

It is owned by the County Highway Agency.