US Bridges

County Road 61 over Diver. of S Platte River

Fair

Weld County, Colorado · 1.6 MI N of US HWY 34 · Structure no. WEL061.0-054.0B

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
744
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 61 over Diver. of S Platte River is a prestressed concrete tee beam carrying County Road 61 over Diver. of S Platte River in Weld County, Colorado. It was built in 1970, so it is 55 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 744 vehicles a day, roughly 73% of them trucks, projected to reach 1,057 by 2043. The structure is 101 ft (30.8 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 61
CrossesDiver. of S Platte River
Location1.6 MI N of US HWY 34
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.38385, -104.48889
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span47 ft (14.4 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic744 (2023)
Projected traffic1,057 by 2043
Trucks73%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 61 over Diver. of S Platte River built?

It was built in 1970, making it 55 years old in 2025.

What condition is County Road 61 over Diver. of S Platte River 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 May 2024.

How much traffic does County Road 61 over Diver. of S Platte River carry?

About 744 vehicles per day (2023 count), of which roughly 73% are trucks.

How long is County Road 61 over Diver. of S Platte River?

The structure is 101 ft (30.8 m) long with a longest span of 47 ft (14.4 m) and a deck 30 ft wide.

Who owns County Road 61 over Diver. of S Platte River?

It is owned by the County Highway Agency.