US Bridges

County Road 58 over South Platte River

Good

Weld County, Colorado · 0.6 MI E of Hemlock ST · Structure no. WEL058.0-047.0B

Built
1990
35 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
595 ft
6 main spans
Daily traffic
8,636
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 58 over South Platte River is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road 58 over South Platte River in Weld County, Colorado. It was built in 1990, so it is 35 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 8,636 vehicles a day, roughly 55% of them trucks, projected to reach 12,263 by 2043. The structure is 595 ft (181.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 58
CrossesSouth Platte River
Location0.6 MI E of Hemlock ST
RouteCounty Highway 0
Coordinates40.4098, -104.61811
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length595 ft (181.5 m)
Longest span98 ft (29.9 m)
Deck width37 ft (11.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,636 (2023)
Projected traffic12,263 by 2043
Trucks55%
Lanes on structure2
Traffic directionOne-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 58 over South Platte River built?

It was built in 1990, making it 35 years old in 2025.

What condition is County Road 58 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 June 2024.

How much traffic does County Road 58 over South Platte River carry?

About 8,636 vehicles per day (2023 count), of which roughly 55% are trucks.

How long is County Road 58 over South Platte River?

The structure is 595 ft (181.5 m) long with a longest span of 98 ft (29.9 m) and a deck 37 ft wide.

Who owns County Road 58 over South Platte River?

It is owned by the County Highway Agency.