US Bridges

Tyler Island Br RD over Georgiana Slough

FairPosted for load

Sacramento County, California · 1.5 MI E Isleton Road · Structure no. 24C0042

Built
1940
85 years old
Condition
Fair
inspected April 2023
Type
Movable - Swing
Steel
Length
355 ft
2 main spans
Daily traffic
252
2009 count
Owner
County
County Highway Agency

About this bridge

Tyler Island Br RD over Georgiana Slough is a steel movable - swing carrying Tyler Island Br RD over Georgiana Slough in Sacramento County, California. It was built in 1940, so it is 85 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 252 vehicles a day, roughly 10% of them trucks, projected to reach 307 by 2041. The structure is 355 ft (108.2 m) long and 23 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesTyler Island Br RD
CrossesGeorgiana Slough
Location1.5 MI E Isleton Road
RouteCounty Highway 0
CountySacramento County
StateCalifornia
Coordinates38.16193, -121.58512
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating36.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+9 approach)
Design loadUnknown
Structure length355 ft (108.2 m)
Longest span94 ft (28.6 m)
Deck width23 ft (6.9 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic252 (2009)
Projected traffic307 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Tyler Island Br RD over Georgiana Slough built?

It was built in 1940, making it 85 years old in 2025.

What condition is Tyler Island Br RD 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 Tyler Island Br RD over Georgiana Slough carry?

About 252 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Tyler Island Br RD over Georgiana Slough?

The structure is 355 ft (108.2 m) long with a longest span of 94 ft (28.6 m) and a deck 23 ft wide.

Who owns Tyler Island Br RD over Georgiana Slough?

It is owned by the County Highway Agency.