US Bridges

Timberline Road over Fossil Creek

Good

Larimer County, Colorado · 0.2 Mi. N. Carpenter Rd. · Structure no. FCTMB-0.2-CRPTR

Built
2004
21 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
100 ft
9 main spans
Daily traffic
12,006
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Timberline Road over Fossil Creek is a concrete culvert carrying Timberline Road over Fossil Creek in Larimer County, Colorado. It was built in 2004, so it is 21 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 12,006 vehicles a day, roughly 15% of them trucks, projected to reach 15,007 by 2042. The structure is 100 ft (30.5 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTimberline Road
CrossesFossil Creek
Location0.2 Mi. N. Carpenter Rd.
RouteCity Street 0
Coordinates40.48375, -105.03936
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans9
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span12 ft (3.7 m)
Deck width60 ft (18.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,006 (2023)
Projected traffic15,007 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Timberline Road over Fossil Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Timberline Road over Fossil 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 June 2023.

How much traffic does Timberline Road over Fossil Creek carry?

About 12,006 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Timberline Road over Fossil Creek?

The structure is 100 ft (30.5 m) long with a longest span of 12 ft (3.7 m) and a deck 60 ft wide.

Who owns Timberline Road over Fossil Creek?

It is owned by the City or Municipal Highway Agency.