US Bridges

US 285 Ml over S Fk South Platte Rvr

Good

Park County, Colorado · 11 MI S. of Fairplay · Structure no. H-13-H

Built
2022
3 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
3,000
2011 count
Owner
State
State Highway Agency

About this bridge

US 285 Ml over S Fk South Platte Rvr is a prestressed concrete stringer/multi-beam or girder carrying US 285 Ml over S Fk South Platte Rvr in Park County, Colorado. It was built in 2022, so it is 3 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 3,000 vehicles a day, roughly 13% of them trucks, projected to reach 4,050 by 2031. The structure is 93 ft (28.2 m) long and 47 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesUS 285 Ml
CrossesS Fk South Platte Rvr
Location11 MI S. of Fairplay
RouteU.S. Route 285D
Coordinates39.07203, -105.97416
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length93 ft (28.2 m)
Longest span88 ft (26.7 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2011)
Projected traffic4,050 by 2031
Trucks13%
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 US 285 Ml over S Fk South Platte Rvr built?

It was built in 2022, making it 3 years old in 2025.

What condition is US 285 Ml over S Fk South Platte Rvr 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 April 2023.

How much traffic does US 285 Ml over S Fk South Platte Rvr carry?

About 3,000 vehicles per day (2011 count), of which roughly 13% are trucks.

How long is US 285 Ml over S Fk South Platte Rvr?

The structure is 93 ft (28.2 m) long with a longest span of 88 ft (26.7 m) and a deck 47 ft wide.

Who owns US 285 Ml over S Fk South Platte Rvr?

It is owned by the State Highway Agency.