US Bridges

County Road 69 over South Platte River

Good

Weld County, Colorado · 0.2 MI N of CO RD 380 · Structure no. WEL069.0_380.0A

Built
1996
29 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
446 ft
4 main spans
Daily traffic
126
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 69 over South Platte River is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road 69 over South Platte River in Weld County, Colorado. It was built in 1996, so it is 29 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 126 vehicles a day, roughly 15% of them trucks, projected to reach 179 by 2041. The structure is 446 ft (135.8 m) long and 38 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesCounty Road 69
CrossesSouth Platte River
Location0.2 MI N of CO RD 380
RouteCounty Highway 0
Coordinates40.34855, -104.41511
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.7 US tons
Inventory rating53.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length446 ft (135.8 m)
Longest span111 ft (33.7 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126 (2021)
Projected traffic179 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 69 over South Platte River built?

It was built in 1996, making it 29 years old in 2025.

What condition is County Road 69 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 May 2024.

How much traffic does County Road 69 over South Platte River carry?

About 126 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is County Road 69 over South Platte River?

The structure is 446 ft (135.8 m) long with a longest span of 111 ft (33.7 m) and a deck 38 ft wide.

Who owns County Road 69 over South Platte River?

It is owned by the County Highway Agency.