US Bridges

County Road 3 over Sullivan Ditch

Fair

Weld County, Colorado · 0.6 MI N of CO RD 12 · Structure no. WEL003.0_012.0B

Built
2004
21 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
2,282
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

County Road 3 over Sullivan Ditch is a steel stringer/multi-beam or girder carrying County Road 3 over Sullivan Ditch in Weld County, Colorado. It was built in 2004, so it is 21 years old, younger 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 5 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 2,282 vehicles a day, roughly 21% of them trucks, projected to reach 3,241 by 2042. The structure is 48 ft (14.5 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 3
CrossesSullivan Ditch
Location0.6 MI N of CO RD 12
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.07972, -105.03683
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.1 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length48 ft (14.5 m)
Longest span43 ft (13.2 m)
Deck width39 ft (11.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,282 (2022)
Projected traffic3,241 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 County Road 3 over Sullivan Ditch built?

It was built in 2004, making it 21 years old in 2025.

What condition is County Road 3 over Sullivan 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 2024.

How much traffic does County Road 3 over Sullivan Ditch carry?

About 2,282 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is County Road 3 over Sullivan Ditch?

The structure is 48 ft (14.5 m) long with a longest span of 43 ft (13.2 m) and a deck 39 ft wide.

Who owns County Road 3 over Sullivan Ditch?

It is owned by the Town or Township Highway Agency.