US Bridges

Cherryvale Road (c over Davidson Ditch

Fair

Boulder County, Colorado · 0.5 MI N of ST HWY 170 · Structure no. BC-39-16.0-ID

Built
1973
52 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
3,123
2022 count
Owner
County
County Highway Agency

About this bridge

Cherryvale Road (c over Davidson Ditch is a concrete culvert carrying Cherryvale Road (c over Davidson Ditch in Boulder County, Colorado. It was built in 1973, so it is 52 years old, older than the Colorado average of 42.2 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 3,123 vehicles a day, roughly 11% of them trucks, projected to reach 3,748 by 2042. The structure is 23 ft (6.9 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCherryvale Road (c
CrossesDavidson Ditch
Location0.5 MI N of ST HWY 170
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates39.96046, -105.22148
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span23 ft (6.9 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,123 (2022)
Projected traffic3,748 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cherryvale Road (c over Davidson Ditch built?

It was built in 1973, making it 52 years old in 2025.

What condition is Cherryvale Road (c over Davidson Ditch 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 February 2025.

How much traffic does Cherryvale Road (c over Davidson Ditch carry?

About 3,123 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Cherryvale Road (c over Davidson Ditch?

The structure is 23 ft (6.9 m) long with a longest span of 23 ft (6.9 m) and a deck 38 ft wide.

Who owns Cherryvale Road (c over Davidson Ditch?

It is owned by the County Highway Agency.