US Bridges

Marshall RD over Alamo Creek

Good

Solano County, California · Near Alamo DR & I-80 · Structure no. 23C0057

Built
1982
43 years old
Condition
Good
inspected October 2022
Type
Slab
Concrete Continuous
Length
98 ft
3 main spans
Daily traffic
5,440
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Marshall RD over Alamo Creek is a concrete continuous slab carrying Marshall RD over Alamo Creek in Solano County, California. It was built in 1982, so it is 43 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 5,440 vehicles a day, roughly 2% of them trucks, projected to reach 9,262 by 2044. The structure is 98 ft (29.9 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMarshall RD
CrossesAlamo Creek
LocationNear Alamo DR & I-80
RouteCity Street 0
Coordinates38.33992, -121.99687
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating74.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length98 ft (29.9 m)
Longest span38 ft (11.6 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,440 (2011)
Projected traffic9,262 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Marshall RD over Alamo Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Marshall RD over Alamo Creek 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 October 2022.

How much traffic does Marshall RD over Alamo Creek carry?

About 5,440 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Marshall RD over Alamo Creek?

The structure is 98 ft (29.9 m) long with a longest span of 38 ft (11.6 m) and a deck 52 ft wide.

Who owns Marshall RD over Alamo Creek?

It is owned by the City or Municipal Highway Agency.