US Bridges

21st ST over Anderson Drain

Fair

Sacramento County, California · 0.1 MI S of Florin RD · Structure no. 24C0302

Built
1955
70 years old
Condition
Fair
inspected January 2025
Type
Culvert
Steel
Length
47 ft
6 main spans
Daily traffic
4,257
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

21st ST over Anderson Drain is a steel culvert carrying 21st ST over Anderson Drain in Sacramento County, California. It was built in 1955, so it is 70 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 6 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 4,257 vehicles a day, roughly 10% of them trucks, projected to reach 6,965 by 2047. The structure is 47 ft (14.2 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries21st ST
CrossesAnderson Drain
Location0.1 MI S of Florin RD
RouteCity Street 0
Coordinates38.49432, -121.4917
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans6
Design loadUnknown
Structure length47 ft (14.2 m)
Longest span7 ft (2.1 m)
Deck width60 ft (18.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,257 (2014)
Projected traffic6,965 by 2047
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 21st ST over Anderson Drain built?

It was built in 1955, making it 70 years old in 2025.

What condition is 21st ST over Anderson Drain 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 January 2025.

How much traffic does 21st ST over Anderson Drain carry?

About 4,257 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is 21st ST over Anderson Drain?

The structure is 47 ft (14.2 m) long with a longest span of 7 ft (2.1 m) and a deck 60 ft wide.

Who owns 21st ST over Anderson Drain?

It is owned by the City or Municipal Highway Agency.