US Bridges

County Road 34 over Platte Valley Canal

Fair

Weld County, Colorado · 0.2 MI E of US HWY 85 · Structure no. WEL034.0-025.0A

Built
1974
51 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
134
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 34 over Platte Valley Canal is a steel stringer/multi-beam or girder carrying County Road 34 over Platte Valley Canal in Weld County, Colorado. It was built in 1974, so it is 51 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 134 vehicles a day, roughly 42% of them trucks, projected to reach 190 by 2042. The structure is 30 ft (9.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 34
CrossesPlatte Valley Canal
Location0.2 MI E of US HWY 85
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.23198, -104.81616
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.4 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length30 ft (9.2 m)
Longest span29 ft (8.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic134 (2022)
Projected traffic190 by 2042
Trucks42%
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 34 over Platte Valley Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is County Road 34 over Platte Valley Canal 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 34 over Platte Valley Canal carry?

About 134 vehicles per day (2022 count), of which roughly 42% are trucks.

How long is County Road 34 over Platte Valley Canal?

The structure is 30 ft (9.2 m) long with a longest span of 29 ft (8.7 m) and a deck 32 ft wide.

Who owns County Road 34 over Platte Valley Canal?

It is owned by the County Highway Agency.