US Bridges

County Road 15B over Castle Creek

Good

Pitkin County, Colorado · 0.2 MI SW of County RD 15 · Structure no. PIT-15B-00.2A

Built
1997
28 years old
Condition
Good
inspected May 2024
Type
Slab
Wood or Timber
Length
39 ft
1 main span
Daily traffic
480
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 15B over Castle Creek is a wood or timber slab carrying County Road 15B over Castle Creek in Pitkin County, Colorado. It was built in 1997, so it is 28 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 480 vehicles a day, roughly 2% of them trucks, projected to reach 528 by 2042. The structure is 39 ft (11.8 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 15B
CrossesCastle Creek
Location0.2 MI SW of County RD 15
RouteCounty Highway 0
CountyPitkin County
StateColorado
Coordinates39.12778, -106.84655
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.1 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length39 ft (11.8 m)
Longest span36 ft (11.1 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2022)
Projected traffic528 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 15B over Castle Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is County Road 15B over Castle Creek 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 May 2024.

How much traffic does County Road 15B over Castle Creek carry?

About 480 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 15B over Castle Creek?

The structure is 39 ft (11.8 m) long with a longest span of 36 ft (11.1 m) and a deck 27 ft wide.

Who owns County Road 15B over Castle Creek?

It is owned by the County Highway Agency.