US Bridges

Alder Creek Road over Seasonal Stream

Good

Solano County, California · 0.3 MI S Landmark Drive · Structure no. 23C0259

Built
2006
19 years old
Condition
Good
inspected March 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
50
2008 count
Owner
City
City or Municipal Highway Agency

About this bridge

Alder Creek Road over Seasonal Stream is a steel stringer/multi-beam or girder carrying Alder Creek Road over Seasonal Stream in Solano 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 50 vehicles a day, projected to reach 107 by 2044. The structure is 85 ft (25.8 m) long and 46 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesAlder Creek Road
CrossesSeasonal Stream
Location0.3 MI S Landmark Drive
RouteCity Street 0
CountySolano County
StateCalifornia
Coordinates38.13762, -122.16941
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating94.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length85 ft (25.8 m)
Longest span82 ft (25.1 m)
Deck width46 ft (14 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2008)
Projected traffic107 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Alder Creek Road over Seasonal Stream built?

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

What condition is Alder Creek Road over Seasonal Stream 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 2022.

How much traffic does Alder Creek Road over Seasonal Stream carry?

About 50 vehicles per day (2008 count).

How long is Alder Creek Road over Seasonal Stream?

The structure is 85 ft (25.8 m) long with a longest span of 82 ft (25.1 m) and a deck 46 ft wide.

Who owns Alder Creek Road over Seasonal Stream?

It is owned by the City or Municipal Highway Agency.