US Bridges

US 34 Ml Ebnd over South Platte River

Good

Weld County, Colorado · 1.6 MI E of JCT SH85-G · Structure no. C-18-EQ

Built
1976
49 years old, rebuilt 2011
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
922 ft
10 main spans
Daily traffic
8,500
2020 count
Owner
State
State Highway Agency

About this bridge

US 34 Ml Ebnd over South Platte River is a prestressed concrete stringer/multi-beam or girder carrying US 34 Ml Ebnd over South Platte River in Weld County, Colorado. It was built in 1976 and reconstructed in 2011, so it is 49 years old, older 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 8,500 vehicles a day, roughly 9% of them trucks, projected to reach 13,685 by 2040. The structure is 922 ft (281 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 34 Ml Ebnd
CrossesSouth Platte River
Location1.6 MI E of JCT SH85-G
RouteU.S. Route 34A
Coordinates40.39351, -104.65279
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionNovember 2023
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 geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating44.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length922 ft (281 m)
Longest span90 ft (27.4 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2020)
Projected traffic13,685 by 2040
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 34 Ml Ebnd over South Platte River built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2011.

What condition is US 34 Ml Ebnd 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 November 2023.

How much traffic does US 34 Ml Ebnd over South Platte River carry?

About 8,500 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is US 34 Ml Ebnd over South Platte River?

The structure is 922 ft (281 m) long with a longest span of 90 ft (27.4 m) and a deck 45 ft wide.

Who owns US 34 Ml Ebnd over South Platte River?

It is owned by the State Highway Agency.