US Bridges

County Road 4 over Frying Pan River

Fair

Pitkin County, Colorado · At Inlet to Reudi Reservo · Structure no. PIT-004-22.0

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
146 ft
2 main spans
Daily traffic
241
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 4 over Frying Pan River is a prestressed concrete stringer/multi-beam or girder carrying County Road 4 over Frying Pan River in Pitkin County, Colorado. It was built in 1970, so it is 55 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 241 vehicles a day, projected to reach 265 by 2042. The structure is 146 ft (44.6 m) long and 28 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

Location

Open in Google Maps
CarriesCounty Road 4
CrossesFrying Pan River
LocationAt Inlet to Reudi Reservo
RouteCounty Highway 0
CountyPitkin County
StateColorado
Coordinates39.36167, -106.73769
Functional classRural Major Collector

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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length146 ft (44.6 m)
Longest span69 ft (21.1 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic241 (2022)
Projected traffic265 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 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 4 over Frying Pan River built?

It was built in 1970, making it 55 years old in 2025.

What condition is County Road 4 over Frying Pan River 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 May 2024.

How much traffic does County Road 4 over Frying Pan River carry?

About 241 vehicles per day (2022 count).

How long is County Road 4 over Frying Pan River?

The structure is 146 ft (44.6 m) long with a longest span of 69 ft (21.1 m) and a deck 28 ft wide.

Who owns County Road 4 over Frying Pan River?

It is owned by the County Highway Agency.