US Bridges

County Road 35 over Platte Valley Canal

Good

Weld County, Colorado · 0.5 MI N of CO RD 38 · Structure no. WEL035.0-038.0A

Built
1966
59 years old, rebuilt 2020
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
280
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 35 over Platte Valley Canal is a steel stringer/multi-beam or girder carrying County Road 35 over Platte Valley Canal in Weld County, Colorado. It was built in 1966 and reconstructed in 2020, so it is 59 years old, older 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 280 vehicles a day, roughly 55% of them trucks, projected to reach 397 by 2042. The structure is 31 ft (9.3 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 35
CrossesPlatte Valley Canal
Location0.5 MI N of CO RD 38
RouteCounty Highway 0
Coordinates40.26779, -104.73474
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 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 rating45 US tons
Inventory rating34.6 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span27 ft (8.3 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2023)
Projected traffic397 by 2042
Trucks55%
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 Platte Valley Canal built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2020.

What condition is County Road 35 over Platte Valley Canal 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 35 over Platte Valley Canal carry?

About 280 vehicles per day (2023 count), of which roughly 55% are trucks.

How long is County Road 35 over Platte Valley Canal?

The structure is 31 ft (9.3 m) long with a longest span of 27 ft (8.3 m) and a deck 29 ft wide.

Who owns County Road 35 over Platte Valley Canal?

It is owned by the County Highway Agency.