US Bridges

Summit Trail over Colorado River

Good

Grand County, Colorado · 1.7 MI N of HWY 34 · Structure no. GRANBY-1

Built
2007
18 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
125 ft
1 main span
Daily traffic
115
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Summit Trail over Colorado River is a steel stringer/multi-beam or girder carrying Summit Trail over Colorado River in Grand County, Colorado. It was built in 2007, so it is 18 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 115 vehicles a day, roughly 2% of them trucks, projected to reach 136 by 2042. The structure is 125 ft (38 m) long and 38 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSummit Trail
CrossesColorado River
Location1.7 MI N of HWY 34
RouteCity Street 0
Coordinates40.10689, -105.95609
Functional classRural 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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating59.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length125 ft (38 m)
Longest span117 ft (35.8 m)
Deck width38 ft (11.5 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2023)
Projected traffic136 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Summit Trail over Colorado River built?

It was built in 2007, making it 18 years old in 2025.

What condition is Summit Trail over Colorado 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 September 2023.

How much traffic does Summit Trail over Colorado River carry?

About 115 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Summit Trail over Colorado River?

The structure is 125 ft (38 m) long with a longest span of 117 ft (35.8 m) and a deck 38 ft wide.

Who owns Summit Trail over Colorado River?

It is owned by the Town or Township Highway Agency.