US Bridges

County Road 8 over South Platte River

Good

Weld County, Colorado · 1.3 MI E of CO RD 23 · Structure no. WEL008.0_025.0A

Built
1994
31 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
204 ft
3 main spans
Daily traffic
151
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 8 over South Platte River is a prestressed concrete continuous box beam or girders - single or spread carrying County Road 8 over South Platte River in Weld County, Colorado. It was built in 1994, so it is 31 years old, younger 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 151 vehicles a day, roughly 60% of them trucks, projected to reach 214 by 2042. The structure is 204 ft (62.2 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 8
CrossesSouth Platte River
Location1.3 MI E of CO RD 23
RouteCounty Highway 0
Coordinates40.0438, -104.83364
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length204 ft (62.2 m)
Longest span66 ft (20.2 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic151 (2022)
Projected traffic214 by 2042
Trucks60%
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 8 over South Platte River built?

It was built in 1994, making it 31 years old in 2025.

What condition is County Road 8 over South Platte River 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 8 over South Platte River carry?

About 151 vehicles per day (2022 count), of which roughly 60% are trucks.

How long is County Road 8 over South Platte River?

The structure is 204 ft (62.2 m) long with a longest span of 66 ft (20.2 m) and a deck 34 ft wide.

Who owns County Road 8 over South Platte River?

It is owned by the County Highway Agency.