US Bridges

Liberty Island RD over Watson Hollow

Good

Solano County, California · N. of Summerset RD · Structure no. 23C0287

Built
2008
17 years old
Condition
Good
inspected March 2021
Type
Slab
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
100
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Liberty Island RD over Watson Hollow is a prestressed concrete slab carrying Liberty Island RD over Watson Hollow in Solano County, California. It was built in 2008, so it is 17 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 266 by 2043. The structure is 49 ft (15 m) long and 52 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesLiberty Island RD
CrossesWatson Hollow
LocationN. of Summerset RD
RouteCounty Highway 0
CountySolano County
StateCalifornia
Coordinates38.18864, -121.72333
Functional classRural 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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length49 ft (15 m)
Longest span43 ft (13.1 m)
Deck width52 ft (15.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2015)
Projected traffic266 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Liberty Island RD over Watson Hollow built?

It was built in 2008, making it 17 years old in 2025.

What condition is Liberty Island RD over Watson Hollow 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 2021.

How much traffic does Liberty Island RD over Watson Hollow carry?

About 100 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Liberty Island RD over Watson Hollow?

The structure is 49 ft (15 m) long with a longest span of 43 ft (13.1 m) and a deck 52 ft wide.

Who owns Liberty Island RD over Watson Hollow?

It is owned by the City or Municipal Highway Agency.