US Bridges

County Road 11 over Sullivan Ditch

Good

Weld County, Colorado · 0.7 MI N of CO RD 16 · Structure no. FRD011.0_016.0C

Built
2004
21 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
912
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

County Road 11 over Sullivan Ditch is a concrete culvert carrying County Road 11 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 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 912 vehicles a day, roughly 14% of them trucks, projected to reach 1,294 by 2042. The structure is 20 ft (6.1 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 11
CrossesSullivan Ditch
Location0.7 MI N of CO RD 16
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.11312, -104.96101
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic912 (2023)
Projected traffic1,294 by 2042
Trucks14%
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 11 over Sullivan Ditch built?

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

What condition is County Road 11 over Sullivan Ditch 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 March 2024.

How much traffic does County Road 11 over Sullivan Ditch carry?

About 912 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is County Road 11 over Sullivan Ditch?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns County Road 11 over Sullivan Ditch?

It is owned by the Town or Township Highway Agency.