US Bridges

Prospect Road over Spring Creek

Fair

Larimer County, Colorado · 0.2 MI E of Timberline RD · Structure no. FCPRST-0.2-TMBL

Built
1987
38 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
107 ft
3 main spans
Daily traffic
24,628
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Prospect Road over Spring Creek is a concrete continuous slab carrying Prospect Road over Spring Creek in Larimer County, Colorado. It was built in 1987, so it is 38 years old, younger 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 24,628 vehicles a day, roughly 7% of them trucks, projected to reach 30,785 by 2042. The structure is 107 ft (32.5 m) long and 87 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesProspect Road
CrossesSpring Creek
Location0.2 MI E of Timberline RD
RouteCity Street 0
CountyLarimer County
StateColorado
Coordinates40.56755, -105.03697
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating50.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length107 ft (32.5 m)
Longest span39 ft (11.9 m)
Deck width87 ft (26.6 m)
Roadway width70 ft (21.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,628 (2023)
Projected traffic30,785 by 2042
Trucks7%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Prospect Road over Spring Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Prospect Road over Spring Creek 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 June 2023.

How much traffic does Prospect Road over Spring Creek carry?

About 24,628 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Prospect Road over Spring Creek?

The structure is 107 ft (32.5 m) long with a longest span of 39 ft (11.9 m) and a deck 87 ft wide.

Who owns Prospect Road over Spring Creek?

It is owned by the City or Municipal Highway Agency.