US Bridges

County Road 64A over N Fork South Platte Rive

Fair

Park County, Colorado · W of Bailey on CR 64A · Structure no. PA64-S0.1-S285

Built
1960
65 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
157
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 64A over N Fork South Platte Rive is a prestressed concrete tee beam carrying County Road 64A over N Fork South Platte Rive in Park County, Colorado. It was built in 1960, so it is 65 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 6 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 157 vehicles a day, projected to reach 211 by 2040. The structure is 53 ft (16.2 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road 64A
CrossesN Fork South Platte Rive
LocationW of Bailey on CR 64A
RouteCounty Highway 0
CountyPark County
StateColorado
Coordinates39.40615, -105.48626
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span50 ft (15.3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic157 (2020)
Projected traffic211 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 64A over N Fork South Platte Rive built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Road 64A over N Fork South Platte Rive 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 April 2023.

How much traffic does County Road 64A over N Fork South Platte Rive carry?

About 157 vehicles per day (2020 count).

How long is County Road 64A over N Fork South Platte Rive?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.3 m) and a deck 24 ft wide.

Who owns County Road 64A over N Fork South Platte Rive?

It is owned by the County Highway Agency.