US Bridges

County Road 39 over Platte Valley Canal

Fair

Weld County, Colorado · 0.7 MI N of CO RD 40 · Structure no. WEL039.0-040.0A

Built
1988
37 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
2,244
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Platte Valley Canal is a steel stringer/multi-beam or girder carrying County Road 39 over Platte Valley Canal in Weld County, Colorado. It was built in 1988, so it is 37 years old, younger 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 2,244 vehicles a day, roughly 59% of them trucks, projected to reach 3,187 by 2043. The structure is 30 ft (9 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 39
CrossesPlatte Valley Canal
Location0.7 MI N of CO RD 40
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.28551, -104.69667
Functional classRural Major Collector

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.4 US tons
Inventory rating17.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length30 ft (9 m)
Longest span27 ft (8.2 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,244 (2023)
Projected traffic3,187 by 2043
Trucks59%
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 39 over Platte Valley Canal built?

It was built in 1988, making it 37 years old in 2025.

What condition is County Road 39 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 39 over Platte Valley Canal carry?

About 2,244 vehicles per day (2023 count), of which roughly 59% are trucks.

How long is County Road 39 over Platte Valley Canal?

The structure is 30 ft (9 m) long with a longest span of 27 ft (8.2 m) and a deck 32 ft wide.

Who owns County Road 39 over Platte Valley Canal?

It is owned by the County Highway Agency.