US Bridges

County Road 66 over Granby Pump Canal

Good

Grand County, Colorado · RD to Spillway · Structure no. 49006601.00033

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
458
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 66 over Granby Pump Canal is a prestressed concrete stringer/multi-beam or girder carrying County Road 66 over Granby Pump Canal in Grand County, Colorado. It was built in 1991, so it is 34 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 458 vehicles a day, roughly 64% of them trucks, projected to reach 540 by 2042. The structure is 95 ft (29 m) long and 31 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesCounty Road 66
CrossesGranby Pump Canal
LocationRD to Spillway
RouteCounty Highway 0
CountyGrand County
StateColorado
Coordinates40.20655, -105.8499
Functional classRural Minor Collector

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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length95 ft (29 m)
Longest span91 ft (27.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic458 (2023)
Projected traffic540 by 2042
Trucks64%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 66 over Granby Pump Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 66 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 66 over Granby Pump Canal carry?

About 458 vehicles per day (2023 count), of which roughly 64% are trucks.

How long is County Road 66 over Granby Pump Canal?

The structure is 95 ft (29 m) long with a longest span of 91 ft (27.8 m) and a deck 31 ft wide.

Who owns County Road 66 over Granby Pump Canal?

It is owned by the County Highway Agency.