US Bridges

County Road 7 over Sullivan Ditch

FairPosted for load

Weld County, Colorado · 0.7 MI N of CO RD 16 · Structure no. FRD007.0-016.0A

Built
1950
75 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
1 main span
Daily traffic
2,211
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

County Road 7 over Sullivan Ditch is a wood or timber stringer/multi-beam or girder carrying County Road 7 over Sullivan Ditch in Weld County, Colorado. It was built in 1950, so it is 75 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. Its operating status is: posted for load restriction.

It carries about 2,211 vehicles a day, roughly 22% of them trucks, projected to reach 3,139 by 2043. The structure is 31 ft (9.4 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 7
CrossesSullivan Ditch
Location0.7 MI N of CO RD 16
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.10943, -104.99886
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.9 US tons
Inventory rating19.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span29 ft (8.7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,211 (2023)
Projected traffic3,139 by 2043
Trucks22%
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 7 over Sullivan Ditch built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Road 7 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 March 2024.

How much traffic does County Road 7 over Sullivan Ditch carry?

About 2,211 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is County Road 7 over Sullivan Ditch?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.7 m) and a deck 24 ft wide.

Who owns County Road 7 over Sullivan Ditch?

It is owned by the Town or Township Highway Agency.