US Bridges

County Road 35 over Union Ditch

Fair

Weld County, Colorado · 0.5 MI N of CO RD 48 · Structure no. WEL035.0-048.0A

Built
1960
65 years old, rebuilt 2007
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
157
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 35 over Union Ditch is a steel stringer/multi-beam or girder carrying County Road 35 over Union Ditch in Weld County, Colorado. It was built in 1960 and reconstructed in 2007, so it is 65 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 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 157 vehicles a day, roughly 47% of them trucks, projected to reach 222 by 2042. The structure is 29 ft (8.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 35
CrossesUnion Ditch
Location0.5 MI N of CO RD 48
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.34064, -104.735
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating26.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic157 (2022)
Projected traffic222 by 2042
Trucks47%
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

OwnerCounty Highway Agency
Maintained byCounty 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 35 over Union Ditch built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2007.

What condition is County Road 35 over Union 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 April 2024.

How much traffic does County Road 35 over Union Ditch carry?

About 157 vehicles per day (2022 count), of which roughly 47% are trucks.

How long is County Road 35 over Union Ditch?

The structure is 29 ft (8.7 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns County Road 35 over Union Ditch?

It is owned by the County Highway Agency.