US Bridges

SH 52 Ml over South Platte River

Fair

Weld County, Colorado · W of JCT 85 @ Ft Lupton · Structure no. D-17-I

Built
1957
68 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
323 ft
9 main spans
Daily traffic
13,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 52 Ml over South Platte River is a concrete stringer/multi-beam or girder carrying SH 52 Ml over South Platte River in Weld County, Colorado. It was built in 1957, so it is 68 years old, older 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 5 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 13,000 vehicles a day, roughly 10% of them trucks, projected to reach 18,330 by 2040. The structure is 323 ft (98.5 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesSH 52 Ml
CrossesSouth Platte River
LocationW of JCT 85 @ Ft Lupton
RouteState Highway 52A
Coordinates40.08004, -104.82208
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.6 US tons
Inventory rating41.6 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length323 ft (98.5 m)
Longest span35 ft (10.7 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2020)
Projected traffic18,330 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 SH 52 Ml over South Platte River built?

It was built in 1957, making it 68 years old in 2025.

What condition is SH 52 Ml over South Platte River 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 November 2023.

How much traffic does SH 52 Ml over South Platte River carry?

About 13,000 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is SH 52 Ml over South Platte River?

The structure is 323 ft (98.5 m) long with a longest span of 35 ft (10.7 m) and a deck 34 ft wide.

Who owns SH 52 Ml over South Platte River?

It is owned by the State Highway Agency.