US Bridges

Nicolaus RD over Airport Slough

Good

Placer County, California · 4.8 MI West of Dowd RD · Structure no. 19C0228

Built
2006
19 years old
Condition
Good
inspected March 2023
Type
Arch - Deck
Concrete
Length
28 ft
1 main span
Daily traffic
3,030
2017 count
Owner
County
County Highway Agency

About this bridge

Nicolaus RD over Airport Slough is a concrete arch - deck carrying Nicolaus RD over Airport Slough in Placer County, California. It was built in 2006, so it is 19 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,030 vehicles a day, roughly 8% of them trucks, projected to reach 4,500 by 2041. The structure is 28 ft (8.5 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNicolaus RD
CrossesAirport Slough
Location4.8 MI West of Dowd RD
RouteCounty Highway 0
CountyPlacer County
StateCalifornia
Coordinates38.89691, -121.46362
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,030 (2017)
Projected traffic4,500 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nicolaus RD over Airport Slough built?

It was built in 2006, making it 19 years old in 2025.

What condition is Nicolaus RD over Airport Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Nicolaus RD over Airport Slough carry?

About 3,030 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is Nicolaus RD over Airport Slough?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 35 ft wide.

Who owns Nicolaus RD over Airport Slough?

It is owned by the County Highway Agency.