US Bridges

Dainty Road over Marsh Creek

Fair

Contra Costa County, California · 800 E Minnesota Ave · Structure no. 28C0400

Built
1964
61 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
50 ft
2 main spans
Daily traffic
4,200
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dainty Road over Marsh Creek is a concrete continuous culvert carrying Dainty Road over Marsh Creek in Contra Costa County, California. It was built in 1964, so it is 61 years old, older 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 4,200 vehicles a day, roughly 4% of them trucks, projected to reach 5,598 by 2047. The structure is 50 ft (15.3 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDainty Road
CrossesMarsh Creek
Location800 E Minnesota Ave
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.93259, -121.71129
Functional classUrban Local

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length50 ft (15.3 m)
Longest span22 ft (6.7 m)
Deck width50 ft (15.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2020)
Projected traffic5,598 by 2047
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Dainty Road over Marsh Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Dainty Road over Marsh Creek 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 January 2025.

How much traffic does Dainty Road over Marsh Creek carry?

About 4,200 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Dainty Road over Marsh Creek?

The structure is 50 ft (15.3 m) long with a longest span of 22 ft (6.7 m) and a deck 50 ft wide.

Who owns Dainty Road over Marsh Creek?

It is owned by the City or Municipal Highway Agency.