US Bridges

Gulf DR over Union Ave Diversion Chan

Fair

Solano County, California · Btwn Ash RD & Sequoia DR · Structure no. 23C0106

Built
1991
34 years old
Condition
Fair
inspected December 2021
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
1,800
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gulf DR over Union Ave Diversion Chan is a concrete continuous culvert carrying Gulf DR over Union Ave Diversion Chan in Solano County, California. It was built in 1991, so it is 34 years old, younger 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 1,800 vehicles a day, roughly 1% of them trucks, projected to reach 4,170 by 2043. The structure is 32 ft (9.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGulf DR
CrossesUnion Ave Diversion Chan
LocationBtwn Ash RD & Sequoia DR
RouteCity Street 0
CountySolano County
StateCalifornia
Coordinates38.28089, -122.02061
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span10 ft (2.9 m)
Deck width58 ft (17.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2015)
Projected traffic4,170 by 2043
Trucks1%
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 Gulf DR over Union Ave Diversion Chan built?

It was built in 1991, making it 34 years old in 2025.

What condition is Gulf DR over Union Ave Diversion Chan 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 December 2021.

How much traffic does Gulf DR over Union Ave Diversion Chan carry?

About 1,800 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Gulf DR over Union Ave Diversion Chan?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (2.9 m) and a deck 58 ft wide.

Who owns Gulf DR over Union Ave Diversion Chan?

It is owned by the City or Municipal Highway Agency.