US Bridges

County Road 6 over South Platte R. Overflow

Fair

Weld County, Colorado · 1.4 MI E of CO RD 23 · Structure no. WEL006.0_025.0B

Built
2001
24 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
3,053
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 6 over South Platte R. Overflow is a steel stringer/multi-beam or girder carrying County Road 6 over South Platte R. Overflow in Weld County, Colorado. It was built in 2001, so it is 24 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 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 3,053 vehicles a day, roughly 34% of them trucks, projected to reach 4,335 by 2042. The structure is 58 ft (17.8 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 6
CrossesSouth Platte R. Overflow
Location1.4 MI E of CO RD 23
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.02956, -104.82075
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length58 ft (17.8 m)
Longest span57 ft (17.4 m)
Deck width40 ft (12.3 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,053 (2022)
Projected traffic4,335 by 2042
Trucks34%
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 6 over South Platte R. Overflow built?

It was built in 2001, making it 24 years old in 2025.

What condition is County Road 6 over South Platte R. Overflow 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 6 over South Platte R. Overflow carry?

About 3,053 vehicles per day (2022 count), of which roughly 34% are trucks.

How long is County Road 6 over South Platte R. Overflow?

The structure is 58 ft (17.8 m) long with a longest span of 57 ft (17.4 m) and a deck 40 ft wide.

Who owns County Road 6 over South Platte R. Overflow?

It is owned by the County Highway Agency.