US Bridges

US 85 Ml Sbnd over South Platte River

Fair

Denver County, Colorado · In Denver on So Santa Fe · Structure no. F-16-IL

Built
1972
53 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
2 main spans
Daily traffic
44,500
2020 count
Owner
State
State Highway Agency

About this bridge

US 85 Ml Sbnd over South Platte River is a steel continuous stringer/multi-beam or girder carrying US 85 Ml Sbnd over South Platte River in Denver County, Colorado. It was built in 1972, so it is 53 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 44,500 vehicles a day, roughly 8% of them trucks, projected to reach 56,070 by 2040. The structure is 215 ft (65.4 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 85 Ml Sbnd
CrossesSouth Platte River
LocationIn Denver on So Santa Fe
RouteU.S. Route 85B
Coordinates39.6925, -104.9944
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating20.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length215 ft (65.4 m)
Longest span106 ft (32.2 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,500 (2020)
Projected traffic56,070 by 2040
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 85 Ml Sbnd over South Platte River built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 85 Ml Sbnd 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 October 2024.

How much traffic does US 85 Ml Sbnd over South Platte River carry?

About 44,500 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is US 85 Ml Sbnd over South Platte River?

The structure is 215 ft (65.4 m) long with a longest span of 106 ft (32.2 m) and a deck 42 ft wide.

Who owns US 85 Ml Sbnd over South Platte River?

It is owned by the State Highway Agency.