US Bridges

Twin Cities Road over Snodgrass Slough

Fair

Sacramento County, California · 2.0 MI East of River RD · Structure no. 24C0053

Built
1931
94 years old, rebuilt 1965
Condition
Fair
inspected April 2023
Type
Movable - Swing
Steel Continuous
Length
1,038 ft
2 main spans
Daily traffic
4,293
2010 count
Owner
County
County Highway Agency

About this bridge

Twin Cities Road over Snodgrass Slough is a steel continuous movable - swing carrying Twin Cities Road over Snodgrass Slough in Sacramento County, California. It was built in 1931 and reconstructed in 1965, so it is 94 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.

It carries about 4,293 vehicles a day, roughly 10% of them trucks, projected to reach 9,503 by 2041. The structure is 1,038 ft (316.4 m) long and 22 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesTwin Cities Road
CrossesSnodgrass Slough
Location2.0 MI East of River RD
RouteCounty Highway 0
CountySacramento County
StateCalifornia
Coordinates38.27676, -121.49913
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating15.8 US tons

Structure

Structure typeMovable - Swing
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+30 approach)
Design loadUnknown
Structure length1,038 ft (316.4 m)
Longest span92 ft (28 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic4,293 (2010)
Projected traffic9,503 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 Twin Cities Road over Snodgrass Slough built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1965.

What condition is Twin Cities Road over Snodgrass 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 Twin Cities Road over Snodgrass Slough carry?

About 4,293 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Twin Cities Road over Snodgrass Slough?

The structure is 1,038 ft (316.4 m) long with a longest span of 92 ft (28 m) and a deck 22 ft wide.

Who owns Twin Cities Road over Snodgrass Slough?

It is owned by the County Highway Agency.