US Bridges

County Road 64 over N Fork South Platte Rive

Poor

Park County, Colorado · W of Bailey/S of US285 · Structure no. PA64-S0.0-S285

Built
1960
65 years old
Condition
Poor
inspected April 2024
Type
Culvert
Steel
Length
52 ft
3 main spans
Daily traffic
1,401
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 64 over N Fork South Platte Rive is a steel culvert carrying County Road 64 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,401 vehicles a day, roughly 4% of them trucks, projected to reach 1,878 by 2040. The structure is 52 ft (15.9 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Road 64
CrossesN Fork South Platte Rive
LocationW of Bailey/S of US285
RouteCounty Highway 0
CountyPark County
StateColorado
Coordinates39.40617, -105.47811
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length52 ft (15.9 m)
Longest span14 ft (4.4 m)
Deck width49 ft (14.8 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,401 (2020)
Projected traffic1,878 by 2040
Trucks4%
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 64 over N Fork South Platte Rive built?

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

What condition is County Road 64 over N Fork South Platte Rive in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

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

About 1,401 vehicles per day (2020 count), of which roughly 4% are trucks.

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

The structure is 52 ft (15.9 m) long with a longest span of 14 ft (4.4 m) and a deck 49 ft wide.

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

It is owned by the County Highway Agency.