US Bridges

County Road 64 over Granby Pump Canal

Good

Grand County, Colorado · RD Btwn Granby/Shadow Mtn · Structure no. 049006400.1031A

Built
1995
30 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
604
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 64 over Granby Pump Canal is a prestressed concrete stringer/multi-beam or girder carrying County Road 64 over Granby Pump Canal in Grand County, Colorado. It was built in 1995, so it is 30 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 604 vehicles a day, roughly 51% of them trucks, projected to reach 713 by 2042. The structure is 108 ft (32.8 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 64
CrossesGranby Pump Canal
LocationRD Btwn Granby/Shadow Mtn
RouteCounty Highway 0
CountyGrand County
StateColorado
Coordinates40.20092, -105.86373
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.7 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length108 ft (32.8 m)
Longest span102 ft (31.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic604 (2023)
Projected traffic713 by 2042
Trucks51%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 64 over Granby Pump Canal built?

It was built in 1995, making it 30 years old in 2025.

What condition is County Road 64 over Granby Pump Canal 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 County Road 64 over Granby Pump Canal carry?

About 604 vehicles per day (2023 count), of which roughly 51% are trucks.

How long is County Road 64 over Granby Pump Canal?

The structure is 108 ft (32.8 m) long with a longest span of 102 ft (31.1 m) and a deck 34 ft wide.

Who owns County Road 64 over Granby Pump Canal?

It is owned by the County Highway Agency.