US Bridges

Isleton Rd(wg) over Georgiana Slough

FairPosted for load

Sacramento County, California · Conncts Isltn RD + Riv RD · Structure no. 24C0039

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Movable - Swing
Steel
Length
289 ft
2 main spans
Daily traffic
2,458
2009 count
Owner
County
County Highway Agency

About this bridge

Isleton Rd(wg) over Georgiana Slough is a steel movable - swing carrying Isleton Rd(wg) over Georgiana Slough in Sacramento County, California. It was built in 1962, so it is 63 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 2,458 vehicles a day, roughly 10% of them trucks, projected to reach 1,733 by 2041. The structure is 289 ft (88.1 m) long and 31 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesIsleton Rd(wg)
CrossesGeorgiana Slough
LocationConncts Isltn RD + Riv RD
RouteCounty Highway 0
CountySacramento County
StateCalifornia
Coordinates38.23723, -121.518
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.4 US tons
Inventory rating21.8 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+3 approach)
Design loadHS 20
Structure length289 ft (88.1 m)
Longest span100 ft (30.5 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,458 (2009)
Projected traffic1,733 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Isleton Rd(wg) over Georgiana Slough built?

It was built in 1962, making it 63 years old in 2025.

What condition is Isleton Rd(wg) over Georgiana Slough 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 2023.

How much traffic does Isleton Rd(wg) over Georgiana Slough carry?

About 2,458 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Isleton Rd(wg) over Georgiana Slough?

The structure is 289 ft (88.1 m) long with a longest span of 100 ft (30.5 m) and a deck 31 ft wide.

Who owns Isleton Rd(wg) over Georgiana Slough?

It is owned by the County Highway Agency.